Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2318a24816dd9c…

MALICIOUS

PDF

70.0 KB Created: 2021-02-01 16:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a827d0ee317a883e3780e8d4c2dd97f5 SHA-1: c1d6adeb3965ae52c40d19245132f3dfd1b05d31 SHA-256: fd2318a24816dd9c16fd21aa922ead1e6d04fc474b349b8bf6a8b53aada89d9c
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 a significant number of external links, identified as a link farm. The primary URL, 'https://maypoin.ru/123?utm_term=fitch+fuel+catalyst+does+it+work', suggests a potential lure or phishing attempt. The presence of multiple links hosted on disposable domains like 'weebly.com' and 's123-cdn-static.com' further indicates malicious intent, likely for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

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://maypoin.ru/123?utm_term=fitch+fuel+catalyst+does+it+work PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460461/normal_5fc79eadcfe77.pdfIn PDF document text
    • https://kajugomurabamuj.weebly.com/uploads/1/3/0/8/130814292/zesoxeterev_mozodawewumewiv.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/lodasadifipejefogiso.pdfIn PDF document text
    • https://jokuduzasaru.weebly.com/uploads/1/3/1/3/131381103/kezafiwozedogiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426059/normal_5fe8ebc619602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479254/normal_5ff9cd6a50380.pdfIn PDF document text
    • http://tederurokeroga.iblogger.org/sujadatov.pdfIn PDF document text
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/8711474.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/mupogi-xajaza-lolikufe-bobewijanomisal.pdfIn PDF document text
    • https://fewebiporunivag.weebly.com/uploads/1/3/0/7/130775920/zowunapowiwoj_tobobusoronatut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468571/normal_6003761c46a77.pdfIn PDF document text
    • http://ruwaxidalemib.iblogger.org/convert_base64_to_blob_javascript.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/batoragubukepo/chauvet_obey_40_user_manual.pdfIn PDF document text
    • http://lesefapor.epizy.com/b._c._g_injection_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/cellular_lightweight_concrete_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/nccn_lung_cancer_screening_guidelines.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_off0000d543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD543 5320 bytes
SHA-256: 4180d05383dd23b30d33eae1030a5bbf3ffbbacdf6a409556f717393ce0f0d73
font_01_sfnt_off0000e776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 10252 bytes
SHA-256: 8b9b8c48d3a60083b56959c5c6280de5a4bb049f5393e292ab0fe23cdba859a3

Open this report in the interactive analyzer, or submit your own file for analysis.