Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a187a88572db21…

MALICIOUS

PDF

74.5 KB Created: 2021-04-01 10:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 578650456b4a69a204a59c2e6307499f SHA-1: 587dd2910e47deeb62178b26c344571089e00e30 SHA-256: a0a187a88572db2164ad8503459dc2876a7883c082a8cbf16e482675977c6c2a
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://dafemum.ru/strik?utm_term=nutritional+info+dunkin+donuts+blueberry+muffin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487918/normal_6049129e3fec8.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/variables_de_java.pdfIn PDF document text
    • https://sexanugujox.weebly.com/uploads/1/3/4/2/134266496/2884289.pdfIn PDF document text
    • https://puwikopigab.weebly.com/uploads/1/3/1/1/131163601/dowaxani_rivaso_maguv.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/3361100.pdfIn PDF document text
    • https://wixexiwe.weebly.com/uploads/1/3/5/3/135316610/faxopezi.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/Wjeighj/48898374091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382960/normal_5fed724d1ac74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_601d73adb181c.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/ifyNhdd/football_today_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/IjexRwX/fujupevap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475729/normal_60549df8a9727.pdfIn PDF document text
    • https://risibazizugati.weebly.com/uploads/1/3/4/7/134710005/jawinigituxelabo.pdfIn PDF document text
    • http://ninijefaligogi.mygamesonline.org/anemia_macroctica_normocromica.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/cgeuig3/garunomavirofudumepa.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/gAIVieZ/fanusuvux.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/88ea4f73-c329-4b04-b0c7-cd971cf51b17/do_the_best_do_my_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57250452-bcca-4515-9d2a-0ab2c6f53ba7/thomas_merton_quotes_on_god.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/pes_manual_usmc_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c0cc02-6546-41b9-a5a1-c0d90821878c/phrasal_verbs_upper_intermediate_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/accc136b-a5ed-47cf-9446-b562890b0d17/pesazasuxetunuzipexoso.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F9 5328 bytes
SHA-256: 198e878d90606963c6152f837710de1428ccb91870c1cf2b050715cebd6f3be2
font_01_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 10800 bytes
SHA-256: 0c2aa07ed3aa4d99bf9dd7b0b652473b9ac7e31dc0829850805166c99373b25e

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