Malicious PDF — malware analysis report

Static analysis result for SHA-256 4769e00a630bdca5…

MALICIOUS

PDF

76.0 KB Created: 2021-05-17 10:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9261eaa0d031ea22d50012cf6d9288f8 SHA-1: 1354634076963be2f91d56fe99c8ff94b5a38cd8 SHA-256: 4769e00a630bdca5f2710a3abd10623dc77a0a71ddcf79b40f180d32f0842cda
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 0.9993

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://fokemale.ru/strik?utm_term=how+to+setup+my+logitech+bluetooth+keyboard PDF link annotation
    • https://vujewixijul.weebly.com/uploads/1/3/1/4/131437312/4d0544d541e58b.pdfIn PDF document text
    • http://laxana.ru/669290493534ax8j.pdfIn PDF document text
    • http://patamekuzon.iblogger.org/85463210326.pdfIn PDF document text
    • http://hookup153.space/misty_erroll_garner_piano_sheet_musica3kz4.pdfIn PDF document text
    • http://helpcreditscore.info/47611014289assts.pdfIn PDF document text
    • https://vukumurumijolot.weebly.com/uploads/1/3/4/4/134433046/4361159.pdfIn PDF document text
    • http://bathforlegs.xyz/19490596566gngjd.pdfIn PDF document text
    • https://reganumezeku.weebly.com/uploads/1/3/4/7/134749319/videra.pdfIn PDF document text
    • https://dimofudo.weebly.com/uploads/1/3/0/7/130739930/7a97869591397.pdfIn PDF document text
    • https://guveroza.weebly.com/uploads/1/3/4/4/134484502/dudozoj_viruja.pdfIn PDF document text
    • https://bikiwilusi.weebly.com/uploads/1/3/4/5/134512037/nekegazoxupux-sixukunuge-nisogefumim-xubixakedejo.pdfIn PDF document text
    • https://nizufijaduwetep.weebly.com/uploads/1/3/5/3/135309937/jefigezelidad-xijamesaginok-nofepo.pdfIn PDF document text
    • http://samelike.site/giredoxafugabijolobugjievq.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/8eb40079-ac82-425d-94ad-4a1d036563ae/zelanejozurew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/116d79a2-3301-439a-be35-15dd28b29560/oxford_collocations_dictionary_for_students_of_english_free.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/video_from_twitter_messages.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/50315252868.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/mojizisilinejar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/953f8529-2911-4adc-b28d-8834eb5e19b7/how_to_get_skinny_legs_with_resistance_bands.pdfIn PDF document text
    • http://morubuzis.rf.gd/45697984901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7162cea3-4e68-448f-a55f-9c95a93d51e3/nogopijokesokime.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/guvavutadotigadeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e6bed7-72d4-41fc-b7e1-582f4ee8350a/pulobuguvo.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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 5848 bytes
SHA-256: d5ad28bd0a164e021db3e7a2abad1f8763b3f197432e59a94ae7451039d1a0c5
font_01_sfnt_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 10560 bytes
SHA-256: 140a515ff0705ed007dc113d4c127e45ca1a34e05eba3e4b1e683e13dd3692d5

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