Malicious PDF — malware analysis report

Static analysis result for SHA-256 521181b8a5f33013…

MALICIOUS

PDF

71.3 KB Created: 2021-03-16 04:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 35694166e2bceb2e59952b1d830a01ff SHA-1: 598562ed99ea7687400f5f58b526850ca7399fdd SHA-256: 521181b8a5f33013f5a86acc0e21e3f351038d9b86faf922f2a441fe99f21f29
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 0.9996

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://mezovuduw.ru/123?utm_term=mens+70s+platform+boots+cheap PDF link annotation
    • https://dapadode.weebly.com/uploads/1/3/4/6/134646205/1c0bc257f644c.pdfIn PDF document text
    • http://mihetos.xyz/61747136215teo2w.pdfIn PDF document text
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/8080180.pdfIn PDF document text
    • http://intekzafast.online/icsee_camera_free56n0h.pdfIn PDF document text
    • http://prod-fruit.space/32972617230xgaxp.pdfIn PDF document text
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/8dbaafee7fb.pdfIn PDF document text
    • http://trokot-shopnew.online/suguxenncxxy.pdfIn PDF document text
    • http://sallehq.xyz/creswell_research_design_5th_edition_citation1alle.pdfIn PDF document text
    • http://bonifacy.site/7612516566wsayv.pdfIn PDF document text
    • http://good-production9.site/70412063398hvarr.pdfIn PDF document text
    • http://roflan.site/music_concert_brochure_templatel6rl2.pdfIn PDF document text
    • http://hisgohar.site/354249706200tjoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://darasupelu.rf.gd/sowemodokafojejiben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/174a67f4-6f6e-466b-8cfc-94540237e63a/what_schooling_do_i_need_to_become_a_real_estate_agent.pdfIn PDF document text
    • http://povopivetidutas.rf.gd/black_skin_white_masks_quotes.pdfIn PDF document text
    • http://resuzebapaluga.rf.gd/business_law_exam_1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d9e4ec-ea18-4149-bc16-5b12ab16db4d/rivufiwowa.pdfIn PDF document text
    • http://kofukobekageja.epizy.com/why_am_i_getting_acid_reflux_so_often.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/272af6b9-1e87-4887-95a9-77ca105b3303/raxibefuk.pdfIn PDF document text
    • http://tipixerokofor.epizy.com/kivizedawekijilijafununil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/295f86cb-6bba-447b-ae53-57390c091b72/celestron_skyportal_wifi_module_setup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF03 5624 bytes
SHA-256: 0443bf07afd4c5b6d3a0eb14014daf213901e7c7c5d4616d3944170c02ac5969
font_01_sfnt_off0000e1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 11220 bytes
SHA-256: 9d5337621ddbd85264f798421089e726b4822adac78faf60aca461d2005f2b2e

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