Malicious PDF — malware analysis report

Static analysis result for SHA-256 df311b5552dcf20b…

MALICIOUS

PDF

75.1 KB Created: 2021-01-30 03:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 272a11fd6eb7e1a9aead97d0e2f01dc3 SHA-1: 7175dbb92598d3bde5d37937522c6d0c6d9d5297 SHA-256: df311b5552dcf20bd7c6adce319844adadc038bdd09c13460ad4acbcce259383
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/123?utm_term=lapd+crown+victoria+for+sale PDF link annotation
    • http://mozafebafurekuk.iblogger.org/mahabharat_animation_movie_2013_free.pdfIn PDF document text
    • https://xetasigebe.weebly.com/uploads/1/3/4/4/134443645/rosiluxo.pdfIn PDF document text
    • https://mozabedo.weebly.com/uploads/1/3/5/3/135323929/wabavotonotulume.pdfIn PDF document text
    • https://nililekekikare.weebly.com/uploads/1/3/0/7/130739967/banavus-jaguginam-jizixuditazezi-lugitibobekal.pdfIn PDF document text
    • https://barijenevedi.weebly.com/uploads/1/3/1/4/131438420/6890519.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/8b71d97.pdfIn PDF document text
    • http://bofesota.66ghz.com/xotejikovuwive.pdfIn PDF document text
    • http://dazixetenulega.22web.org/57976001713.pdfIn PDF document text
    • http://lenudes.com/titewulosidutiputusurukerst6gk.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/xavitenikoxurev.pdfIn PDF document text
    • https://kajipeluvo.weebly.com/uploads/1/3/4/3/134318391/gefozinikukuje.pdfIn PDF document text
    • http://viza.expert/jipogudukqyohp.pdfIn PDF document text
    • https://ninitirasaru.weebly.com/uploads/1/3/5/3/135317350/wolek_mogitul_wuvisek.pdfIn PDF document text
    • https://timifuxi.weebly.com/uploads/1/3/4/6/134676324/3aa0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/99310597202.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/abrahaminte_santhathikal_full_movie_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/pexiximof.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/armitage_shanks_doc_m_shower_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/equifax_settlement_claim_form_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF0 5032 bytes
SHA-256: 83859290a867034a9356f773055adeef32405082b467fa712423077416620630
font_01_sfnt_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 10872 bytes
SHA-256: 3ef99817551e0b007a81b498b2b059151bc78e789287475c86e43090680376b1
font_02_sfnt_off0001114c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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