Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae1591355bf9a15…

MALICIOUS

PDF

114.6 KB Created: 2021-06-10 12:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d6fa6c4bf4806d33bb909706d1003704 SHA-1: 5496a17318141f22e96fa85f58363e88ac5350ac SHA-256: aae1591355bf9a15e3675b8f4d65f765552d1ad9dac96f7fe233abb2145fb9f1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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 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://laborke.ru/pbw?utm_term=doraemon+movie+tamil+full PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482402/normal_5fe962b969120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5fd75107208bc.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4424630/normal_60b4b43fdd11e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://bemulopawed.pbworks.com/w/file/fetch/144462372/download_driving_school_sim_2020_mod_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc65c984-b04a-4716-a5ab-6dfd9bf78bfe/40788627817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b35664-7535-4791-bde6-1a548c4b7d76/ladedoketuxuvevo.pdfIn PDF document text
    • http://mupalunava.pbworks.com/f/8132987286.pdfIn PDF document text
    • http://tavaretaz.pbworks.com/f/98085220460.pdfIn PDF document text
    • http://wekibivu.pbworks.com/f/lubenito.pdfIn PDF document text
    • http://vezawegafu.pbworks.com/w/file/fetch/144875202/sumijat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5a790b-4369-4210-ba84-d1987213d698/83761039556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff805578-0b59-4359-a488-c84d634eee83/the_walking_dead_graphic_novels_volumes.pdfIn PDF document text
    • http://suwoluran.pbworks.com/f/polynomial_word_problems_with_solutions.pdfIn PDF document text
    • http://suniger.pbworks.com/f/padman_full_movie_download_in_tamilrockers.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/exercises_for_sciatica_pain_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d5c087-2d62-4f1d-b9a8-16182e7e4bd9/epson_wf-2540_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48306c4d-20fd-4a71-ae6c-b0449454e9a1/4620120927.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://www.gnu.org/licenses/gpl.htmlIn 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_off0001074f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074F 11452 bytes
SHA-256: ee82a1c26e517e0eb3c3c0238528e44540a5d7ffec2f89ff4344f28266d03af9
font_01_sfnt_off00012d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D60 4796 bytes
SHA-256: 00a48cafe6cfa88aadb3fb8100175d30674fd90d5cb7158d997e1099615958fe
font_02_sfnt_off00013da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA2 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_03_sfnt_off000148fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148FA 8316 bytes
SHA-256: dade75a0a6e9102cd2b2db8989aa6629e3d8dbb7798d5ae692214715e86ed7fa
font_04_sfnt_off00015fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FEA 16096 bytes
SHA-256: af9857885d262121abc71ffe4ae1ba8ec0a2ff44747523e9c9d3607795c8d95e
font_05_sfnt_off00018edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EDB 16060 bytes
SHA-256: d26390a1b495fc4844790f49287189703365677ecb3af67b7cca25d146cf5ea9
font_06_sfnt_off0001a3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3AD 7064 bytes
SHA-256: 08a933b8fbb46e6ae595941b32a3102396cbef8118f6eb05b57eef7c1d7dba4d

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