Malicious PDF — malware analysis report

Static analysis result for SHA-256 2908257bd46ba10b…

MALICIOUS

PDF

104.2 KB Created: 2021-06-01 03:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01359c41023be446d3b98918b3c02e44 SHA-1: 15034d6c47a8c49917a6c09762a4ea12b7b45353 SHA-256: 2908257bd46ba10bc53fed4d1e8ebfd50d9f5dc6637e3b819aebfe639800bd30
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pistant.ru/pbw?utm_term=nautical+almanac+2008+pdf+download PDF link annotation
    • https://radetotoko.weebly.com/uploads/1/3/4/6/134697609/datutuzalele_vaxawog.pdfIn PDF document text
    • https://mibakadediwo.weebly.com/uploads/1/3/4/5/134584598/6686680.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/96ba8105-6527-47b2-9bcc-60d24a1901b3/14303883230.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144432453/how_do_i_set_a_time_limit_on_my_samsung_tablet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbf6187-b005-4305-a2d7-788cebc90f14/download_abaqus_6.14_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94bcad35-c167-45fe-a14d-484c9194b5a8/diary_of_a_wimpy_kid_long_haul_cast_rodrick.pdfIn PDF document text
    • http://xetibubib.pbworks.com/w/file/fetch/144411609/68024656535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d048c9-0988-4600-a677-8356c326e555/19128062832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc084f93-d6f9-40d8-9148-3a3abdbd0997/petoboguposixuzaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd89ea1-c76c-40ba-bf76-c8f6715b8982/soundlogic_xt_keyboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbdae5ce-7f1c-4eba-9579-61063c3adec0/myoepithelial_carcinoma_survival_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb86ba6-4f02-469c-a0f3-cfb0b2d3c551/jokiganatozupilisejukit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87913d36-669b-42a9-8daa-1338a6585ede/38993818751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e122c4ec-88e6-4ab1-8a1a-733eba58be93/top_load_washer_fabric_softener_not_draining.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/387e9591-f503-413f-84e0-8b8a9831a74c/tusoterul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab541b5c-2cff-490c-b93b-1f709e07c176/interesting_mathematics_puzzles_with_answers_grade_6.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/f/64875718394.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/teludotefezik.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/f/mawedawakufuvisale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70914edb-7bc4-424d-83c1-32b93920695a/electronic_circuit_analysis_and_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f0ef75-602b-416f-a2a5-7f9ee3471748/can_i_make_an_appointment_at_the_texas_dmv_to_renew_my_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e5adae-1eb2-4857-97ff-fd78990c961c/37607503210.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 5292 bytes
SHA-256: ae13c227055a2fce608680c0e301ccea03e959e88bd6a97738087194266a2376
font_01_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 5556 bytes
SHA-256: a632375e0f1722b2de706a15626bc163c332dcb1d02ba723d9bbc6a62d5d0d73
font_02_sfnt_off00011e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E41 3480 bytes
SHA-256: 165bcc212c6153266e507b5e49cff26bb3afdb583fbbcc26bd3a05c422a1b7a0
font_03_sfnt_off00012b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0D 5096 bytes
SHA-256: ae99bde291dedbd875530a4ce0a08907aac36d3c9490ce302deafe56496139d7
font_04_sfnt_off00013bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAC 14228 bytes
SHA-256: cd860d879ebc24144709db9e125cbfa6028f42c7dbcb3b061fd8bfbbb8a6509a
font_05_sfnt_off00016786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16786 17204 bytes
SHA-256: 1b976168e082e83bd2ebd7a9b5d564dfe1d05de4573d00a502826fa774a6ca0d
font_06_sfnt_off0001809c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1809C 3768 bytes
SHA-256: f63caaf182d188404081cf81678bf4218c4ec511340b83831e49f733eeab3e5b

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