Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0e09f0504c63bb…

MALICIOUS

PDF

81.6 KB Created: 2021-05-20 13:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7d553218401944f831302c1fcf7264ef SHA-1: 31c7f4273bb3109b6ccedf34207bb1afd4785cf2 SHA-256: ac0e09f0504c63bb317b7c73acb1a678fb714c2f52f1874a945369f3c65ffe4a
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 0.9993

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 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://midufefew.ru/strik?utm_term=jogos+vorazes+em+chamas+online+completo+e+dublado PDF link annotation
    • https://negofajosodin.weebly.com/uploads/1/3/5/3/135314147/basatozuziwi_baleketevu.pdfIn PDF document text
    • https://kibipevanisimak.weebly.com/uploads/1/3/4/7/134770361/bopoponabul_gozerikoxogaku_xagawawij.pdfIn PDF document text
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/vosakotamo-nipokeximugago-buvujilawun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_60201b3a14c05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fe4054d67fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_600a9d9213c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485310/normal_606d049c74d31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_605d7bc537155.pdfIn PDF document text
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/4043749.pdfIn PDF document text
    • https://ximepovefuvaxoj.weebly.com/uploads/1/3/1/8/131856443/68901.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/save_game_god_of_war_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/25376548655.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/44506227951.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/95247116019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6473ef-6d0e-47cb-b504-94d1e5e9e098/how_to_thank_someone_for_immediate_response.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df82e1b-21d7-4a11-ab55-c567462d6cbe/46632285300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab60908c-1b7a-4abf-821f-abd0a524b0d3/what_causes_a_car_to_get_stuck_in_gear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e588c3c-a6ba-45db-844c-750dc238c2f2/self_reliance_ralph_waldo_emerson_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a44ad780-ff6d-4d9f-96f9-fb18c10b523f/20047202735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91fa35ff-d08a-4e49-97bd-0e3508cebec2/kikexinejewofize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f8145b-4bf2-42eb-b975-b3eee5a15af9/78681680192.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/taxuke.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/raymond_chandler_marlowe_books_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/choomantar_full_video_song_hd_1080p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b44bbab-abfd-4047-a6ed-e1df61a1f36b/kegekejigodugulo.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_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 5724 bytes
SHA-256: f5a06dcee762fadf4256618dd7ff0e6492f51a2fb8c477b1ca7931db8c710ea8
font_01_sfnt_off00010f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 13068 bytes
SHA-256: 38e6fbe97ae87c429f7175a953b94a6aacd0d852f1d6c8199f6dcf5a8affdabb

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