Malicious PDF — malware analysis report

Static analysis result for SHA-256 95644b9345cfaf70…

MALICIOUS

PDF

78.2 KB Created: 2021-03-25 11:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 87bd2f8f388a2b649bec1d7f37d86f86 SHA-1: 1509350d7c7937aabfcc5d14cf0c405731a186f4 SHA-256: 95644b9345cfaf70b44d970b264b201a913117ce0cf0c0d77e78613417042408
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9991

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 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.
  • 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://vilenefex.ru/strik?utm_term=los+30+derechos+humanos+en+ingles+y+espa%25C3%25B1ol PDF link annotation
    • http://helpcontactform.com/boondocks_theme_song_free3runk.pdfIn PDF document text
    • http://copyright-helps-team.com/begokujk0di.pdfIn PDF document text
    • http://salearea.pro/face_mask_for_toddler_patterntse4g.pdfIn PDF document text
    • http://bahis-sikayet.com/tribal_wars_2_buildsk0yuu.pdfIn PDF document text
    • http://hookup158.fun/dexovqdgsr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c9b78dd-6317-4fd5-8b08-63c1db1719dd/bsa_citizenship_in_the_nation_merit_badge_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d2da08-2a7e-4f0c-82a4-62bbfcd9182e/go_math_2nd_grade_practice_book.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/tamasha_hd_video_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/poxulijoda.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/ashton_hagans_ky.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_ef4837ff460441d9b600c04878d8ff53.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_07387f9cb522416d9a6333f125a7769a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonivezada/food_safety_hygiene_and_sanitation.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/24489334487.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/rokifal.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/23291600913.pdfIn PDF document text
    • https://d7d9470a-9784-4c28-ac68-b1ab0f70ddf3.filesusr.com/ugd/148484_b28b3f1704f34206973ecf3c9aaa6638.pdf?index=trueIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_c809fa4939044815943d29568ffc6320.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lukepepe/how_long_should_a_55_year_old_man_be_able_to_hold_a_plank.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/sebasuporibejo.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/libubaxaforilojepesos.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_3c5293f2278844ad90ca9785c574ed88.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/why_was_andrew_johnson_important.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/wudizi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 6048 bytes
SHA-256: 106ee7c1eda02350272817c7c689debc7f09c90d441ee3284be447fac1a97538
font_01_sfnt_off0001023d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023D 11744 bytes
SHA-256: c9c92829d64d9c4ef7ec0eb315d07a92a6d7170cbaf5f2e7a7ed7e511c3105a2

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