Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49f1a4a8e78d211…

MALICIOUS

PDF

81.3 KB Created: 2021-05-06 02:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 89f4b49c93ed6398eef14b12c82c7f9d SHA-1: da7351c81712e1937166ea3c87e95bd0d32dd2cf SHA-256: d49f1a4a8e78d21115773d519369c4b7bc254a398dd5fc2bdb1b15d93b34ebc4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious sites. The presence of these links suggests an attempt to phish users or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=the+blessed+life+book+troy+dobbs PDF link annotation
    • http://cocobeautybar.ca/bonijavavih9yh2.pdfIn PDF document text
    • https://zogolobogin.weebly.com/uploads/1/3/4/6/134690222/temenulif_lerozumajafuwal_tifuve_kumazutexilixaf.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/maravilloso_desastre_libro_1dvwlo.pdfIn PDF document text
    • http://snt-br.ru/susozumomagaziz9vxfj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471109/normal_603970361b237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_6068796ea18c3.pdfIn PDF document text
    • https://befukifesili.weebly.com/uploads/1/3/1/4/131453358/barepodena.pdfIn PDF document text
    • https://dafebifu.weebly.com/uploads/1/3/4/3/134399244/nuvokop-kipelev.pdfIn PDF document text
    • https://xogosafaxisomig.weebly.com/uploads/1/3/0/7/130739024/vuvaden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_5fe7548e765d6.pdfIn PDF document text
    • http://shishkin-seed.xyz/78357143946ppoll.pdfIn PDF document text
    • http://prolac.ru/zitimizufiniximalilevirnu2ra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498986/normal_5ff95e3d83bce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408719/normal_5fc8b89883e93.pdfIn PDF document text
    • http://matroskin.space/76971020056fl1qd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475571/normal_5fe2f4301fed1.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/dububukafofa.pdfIn PDF document text
    • http://prequester.online/xekukereduperefesvuqe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajixe/nice_guidelines_statin_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/school_admission_interview_questions_and_answers_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/jizomu.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/kotolewilus.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_off0001000f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000F 5040 bytes
SHA-256: 88a7dbe0e05d0d94ba6e650681153162f01ad28850f65f821f36dd544f679a71
font_01_sfnt_off00011135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11135 10852 bytes
SHA-256: 11ff3dbb694e9e61ebed4f2b579117e315177813128ce795927da8ea9d7825da

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