Malicious PDF — malware analysis report

Static analysis result for SHA-256 707328a84e5785d1…

MALICIOUS

PDF

69.8 KB Created: 2020-12-22 13:18:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1b0eaf8d8ff363aef72d2cc8a20d5bf3 SHA-1: d608da78e832e0dc00917ae3024231423d6488cb SHA-256: 707328a84e5785d1d7b00f3d11ae7cbc501cf32c795523a0834f43ef4a008fe4
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. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary malicious URL identified is https://traffnew.ru/strik?utm_term=baby+adopteren+in+suriname, which is likely used to redirect users to further malicious content. No scripts were extracted, but the PDF structure and URL patterns indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=baby+adopteren+in+suriname PDF link annotation
    • https://xumuxurubaxuk.weebly.com/uploads/1/3/4/5/134501003/06b31d88e4b5d8e.pdfIn PDF document text
    • https://votuxujalesobe.weebly.com/uploads/1/3/4/6/134683371/c3ffc84bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456119/normal_5fdda2694724f.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/99f1b0.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/loderurapuma-xifetiliv-rewoxujopo-lavota.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/rovafexedesu-wemuvusivipame-vabizeguduves-bexawakovelo.pdfIn PDF document text
    • https://nadaxujapowa.weebly.com/uploads/1/3/4/8/134891343/3710146.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f47a58-eb19-4bda-b7b5-3b33196a6235/gnomes_garden_halloween_level_30.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/70229459652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5060e42a-58ba-4cba-b96b-90f56606e649/chicago_tipped_minimum_wage_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14f4aa13a450babf6e3a6/t/5fcbc66ba51c5a1401b29d95/1607190124825/tefiwumazezuxurodujekedit.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_off0000d5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F5 5364 bytes
SHA-256: ce689f36f065c4d3f05ca2f580e638edfce6f1b1051269fc9837981f3fc16184
font_01_sfnt_off0000e819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE819 10052 bytes
SHA-256: 56ce87c4412abff7e0f7b51082ac6c8f6f59cae72e11cb1c72fbec6f4eae6507

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