Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fee458cef4eb5f3…

MALICIOUS

PDF

90.9 KB Created: 2021-03-16 03:38:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e34b1679b9f3925ab5aabcfae93c197b SHA-1: ed3b4cd48eb5d8ef9d17bacd06292e1195ab6583 SHA-256: 7fee458cef4eb5f39250c4da63624b93b741e36098523cb88e6a2dca1583a404
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. Many of these links point to disposable domains or domains that appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. The primary attack pattern observed is the creation of a link farm within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/wix?keyword=body+glove+water+filter+reviews PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kowelakava.rf.gd/charlie_movie_bgm_masstamilan.pdfIn PDF document text
    • http://jewedib.epizy.com/8581844970.pdfIn PDF document text
    • http://levewome.epizy.com/paliroduv.pdfIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_6e43f46f78d04b919fa36787c67801de.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_704af0207c4a4d3ba4c7ee5cc306e341.pdf?index=trueIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_4ee559477d704851b6ba0b0f8b02063e.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_acf0a93b18bb4e0994be8d26c4908f83.pdf?index=trueIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_206a1637a7eb428daaf6749f86e1e782.pdf?index=trueIn PDF document text
    • http://pubegidunelu.epizy.com/brandywine_boutique_bbb.pdfIn PDF document text
    • http://zofewodugap.rf.gd/kisaxuroralipur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b607437b-34c4-44f8-8174-7a5552555fd7/how_to_describe_depth_of_respirations.pdfIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_67e72a30455e457594c2a932f3641519.pdf?index=trueIn PDF document text
    • http://zigimavabixexib.epizy.com/khaki_green_jumpsuit_missguided.pdfIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_03aa0634b34a4502a971a78b0553a080.pdf?index=trueIn PDF document text
    • http://pomuvoxibi.epizy.com/tetris_blitz_for_android_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6714ac64-2bf5-4300-81e8-94f0e9dd14c7/how_great_thou_art_printable_lyrics.pdfIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_ac4a65e3df05496fab7c0262dcf37468.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_7546bef38536423c94d5378b995cf6c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb115d9-39f5-4c02-bdd9-9c046527f532/add_second_edition_character_sheet.pdfIn PDF document text
    • http://fopajika.epizy.com/free_calendar_template_2019_april.pdfIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_b2eaece32e614e819baf9d53f0b0fe40.pdf?index=trueIn PDF document text
    • http://joxisuzu.rf.gd/komowiloxokunonoviwakama.pdfIn PDF document text
    • http://buzawasilugije.epizy.com/bobamepafedo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F3 5380 bytes
SHA-256: 5450fb39c3e6fcfc970c3558d043a5694d89b4c44b138d5f80e7ea8919d04273
font_01_sfnt_off00013576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13576 11664 bytes
SHA-256: da047ce20a2fc81c048409e1c4e397397bcfd5904d1fa147edf2937f3077e656

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