Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fbb72041b3ab0e…

MALICIOUS

PDF

81.4 KB Created: 2021-05-11 20:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 17a2dcaad0a37af020d6ff2363f42f7a SHA-1: 96f0e330856bbff1419c9f7ff44c14f9b3c01c77 SHA-256: d2fbb72041b3ab0e3d9313d361eb2fe7745b1a265586bb423df075db03af8ae4
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 0.9997

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://pelibifir.ru/strik?utm_term=romeo+and+juliet+movie+online+subtitrat PDF link annotation
    • https://cdn.sqhk.co/jakovenuz/qGXnRja/luxanesuworonaliminuwo.pdfIn PDF document text
    • http://vovpomnim.ru/limebesusukajapejetibuzp10l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_6016a7bf7883e.pdfIn PDF document text
    • http://trastqort.online/movies_to_watch_like_the_darkest_mindsq4ce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473619/normal_601d555502fc4.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidevepip/HvhdIii/bleach_immortal_soul_soul_hall_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372072/normal_5fed12999d8c4.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/ggRLx5T/blue_apron_recipes_salmon.pdfIn PDF document text
    • http://tepumuranabida.iblogger.org/26291267024.pdfIn PDF document text
    • http://websporizlehd.com/dan_the_man_josie_deviantartxsfcq.pdfIn PDF document text
    • http://hristogrigorov.com/reading_plus_answers_level_j_marvel_man18tlb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_6037b0609652b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_5fd860e710d15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabinozugi.epizy.com/business_administration_thesis_sample.pdfIn PDF document text
    • http://tifureboriva.epizy.com/metovokepejijojewaserip.pdfIn PDF document text
    • http://satoposip.epizy.com/flat_stanley_travel_journal_template.pdfIn PDF document text
    • http://nelodetasa.rf.gd/sanim.pdfIn PDF document text
    • http://zuwipipulu.epizy.com/88585180248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8e7897-0572-489d-90c5-49137b2066f9/how_do_you_reheat_leftover_pasta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72800024-aed2-422f-9386-77c35be8b427/ziwifopakelevav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ec696a-9246-40f7-a342-34f732b7fda6/project_based_learning_examples_elementary_school.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_off000100eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EB 5252 bytes
SHA-256: f31ff98cf6673f8f523bf4e71d87f17ff3badf22f75e2e15af3b1e697fc149cf
font_01_sfnt_off000112bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BB 11180 bytes
SHA-256: cd75f7cc561c285808f7f5c4a9234d384ac6860161feae47c4cceac1233bbc0e

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