Malicious PDF — malware analysis report

Static analysis result for SHA-256 0801ca197d5e9a54…

MALICIOUS

PDF

70.4 KB Created: 2021-02-14 12:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fdf66ec21d503e0f6ecc7e066b629ccf SHA-1: 0afebd16c34620b1dc0e00db2b1c532617cdde04 SHA-256: 0801ca197d5e9a54b94c77a969f0c68ae0529a92cc663c911bf524b6e11ed42e
126 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 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://baarspo.ru/123?utm_term=maytag+dryer+repair+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375694/normal_5ff40c1df3d08.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/Ukz7z4C/roblox_gift_card_pins_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472760/normal_6026ebd77f31a.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/Jpjggik/35309556595.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/UdcYdJD/armello_game_pass.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501233/normal_5fdfbf6b80ff2.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/jibPif8/67412841406.pdfIn PDF document text
    • https://xejinifinedi.weebly.com/uploads/1/3/5/3/135305438/bodubuk.pdfIn PDF document text
    • https://lovapunosarimol.weebly.com/uploads/1/3/5/4/135401421/624a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_600ed3d66f277.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409797/normal_5ff5e8409f58a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418167/normal_5fcebd403660d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poserub.rf.gd/xaboxu.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/usmle_genetics_questions.pdfIn PDF document text
    • http://pejefovad.epizy.com/barista_apron_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/7628714773.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/esl_card_games_and_templates.pdfIn PDF document text
    • http://rusozetowozo.epizy.com/vutetux.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/backuptrans_android_iphone_whatsapp_transfer_license_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/gafafafebojatugazaku.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_off0000d60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60C 5208 bytes
SHA-256: 333fd97e989db9ec6675a827c0c18851446dacb474329c2efd8d7d58d1698792
font_01_sfnt_off0000e7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C3 10716 bytes
SHA-256: 3b22d6c21fb138ba2fdd7d58c44595f0eeb77237cb9355fe31327b6ca21b4e8a

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