Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f44b6e222afa45…

MALICIOUS

PDF

78.1 KB Created: 2021-04-07 02:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d1cfebe633138ab87cf0924beed98302 SHA-1: 938e3263ba015143f6f6d71a145c2ac0280f4c4e SHA-256: d2f44b6e222afa4522ef00620767c4d37bab57a9b1238c40f93727325b56b41c
186 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 0.9998

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://crophysi.ru/strik?utm_term=shark+deluxe+pro+vs+ultralight PDF link annotation
    • http://jexujililizatub.22web.org/fozajunul.pdfIn PDF document text
    • http://trikotoria.ru/dopupagezu7kybe.pdfIn PDF document text
    • http://bogplaktnc.fun/38900146448mstyc.pdfIn PDF document text
    • http://zonitupupafof.sportsontheweb.net/free_brush_lettering_worksheets.pdfIn PDF document text
    • http://sellamorem.com/87063679184dnc9h.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/javascript_full_tutorial_download.pdfIn PDF document text
    • http://politach.com/how_to_use_a_mac_for_beginnerspt5kh.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/87325017834.pdfIn PDF document text
    • http://zanofijufitif.22web.org/50_shades_of_gray_cast_bodyguard.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/22977472946.pdfIn PDF document text
    • http://esagafow.fun/first_alert_carbon_monoxide_alarm_keeps_beeping3bj5p.pdfIn PDF document text
    • http://0fruit.space/dinosaurs_vs_aliens_filmavpva.pdfIn PDF document text
    • http://joy-todays.online/doom_2_rpg_pcbncrc.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/2f222601-d294-40af-98e8-39a3dcb2065b/zebedaxivixokimigexab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5cd6171-fc1a-4e96-a202-f92be66c408d/zuwizifefide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c48f7a-77e0-45d7-a216-9d9438a9eb82/what_is_the_best_platform_to_learn_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53fc7582-bf5e-437e-be95-f0a45c142f49/melugoburasizavazizi.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_2c69745ca9904654bf401c74dada691a.pdf?index=trueIn PDF document text
    • https://e474413f-ff6d-4b46-a00c-d4c33541206b.filesusr.com/ugd/ddecc0_4074a34146ce441dac73d690ef3c0017.pdf?index=trueIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_7881f491aaf64a3e92747c999d8c0948.pdf?index=trueIn 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_off0000f22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22E 5516 bytes
SHA-256: 439dffe82feb843ffdaff36cdce251bf7092b8321547a14a29594fb007d71210
font_01_sfnt_off000104ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EC 10700 bytes
SHA-256: db49d27593c3fe41f4590e6d6b6debe18f405835d09adf77fdff2c640983fd95

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