Malicious PDF — malware analysis report

Static analysis result for SHA-256 e268b60919593848…

MALICIOUS

PDF

89.1 KB Created: 2020-12-28 09:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c6ea6ba6702d1d971d49721c0ed4c48e SHA-1: 2caa5b669b4afa08cb361e3371c63de80860bca4 SHA-256: e268b609195938480cd0755fdb16001a27b4c80aa5be0f416ea697bf84708cb4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to exploit users through deceptive content.

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://traffnew.ru/aws?utm_term=bahamas+government+passport+renewal+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411480/normal_5f951ebe41b16.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/ritizinutuxelila.pdfIn PDF document text
    • https://cdn.sqhk.co/xojafimib/hdhfJrj/jomaxenekamusawajepi.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/ahjf1ih/wapekesoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_5fbd97c18cd0e.pdfIn PDF document text
    • https://sorasewemo.weebly.com/uploads/1/3/4/3/134358680/1daec3ffa20507b.pdfIn PDF document text
    • https://nibuwoxemunovox.weebly.com/uploads/1/3/4/7/134714338/dufuzonez-duzamudu-sitidevunupij.pdfIn PDF document text
    • https://cdn.sqhk.co/penunotati/jbhi6Mm/netflix_price_increase_history.pdfIn PDF document text
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/ce9502.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/ghCDie5/hearts_on_fire_necklace.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/gVghyhj/mustang_horse_running_fast.pdfIn PDF document text
    • https://roriwemako.weebly.com/uploads/1/3/4/5/134599113/4741726.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/xasovewipeje/46584474135.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/anodizing_aluminum_process.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/mcafee_antivirus_free_full_version_2018.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_off0001200e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200E 5516 bytes
SHA-256: 8b4c7127c12c35c2d7386a0a454286efac8a5c85662927e684bee922d3dfa59c
font_01_sfnt_off000132c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C1 11084 bytes
SHA-256: c35c4a0f7b02e186ba33286af6de26aa9ef2b5bb5d319a334533a8ec48d16d45

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