Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ba2f03e80c5488…

MALICIOUS

PDF

82.3 KB Created: 2021-03-15 18:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 54ce9d96c3b829eac063e0168276af09 SHA-1: 948ba75fd002268f53b431910b54b154a95219e5 SHA-256: e8ba2f03e80c5488734b48da8b8aff57986d3bb9d8f2ea3ed9b70c2c89cff947
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that mimics a search result for a printer model. This suggests a phishing or SEO poisoning attack designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://golowaki.ru/strik?utm_term=brother+ls+2125i+how+to+thread PDF link annotation
    • https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/7276065.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369772/normal_5fe2ac930c800.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426072/normal_5fe05718546f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365549/normal_6003ea15d0216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500438/normal_5fd7a556ba998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_600d89ac540a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424400/normal_5fc896eaa1c0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391326/normal_5fdfaf573c9ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471114/normal_5fc777f77d7e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450504/normal_5ff12405107b9.pdfIn PDF document text
    • https://domenadonasi.weebly.com/uploads/1/3/0/8/130874365/feteno.pdfIn PDF document text
    • https://ruwijupoxotafan.weebly.com/uploads/1/3/0/8/130814308/1079273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_6028108011613.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_5fcd112ae60e5.pdfIn PDF document text
    • https://kefuvarunif.weebly.com/uploads/1/3/0/7/130739830/xuboserinon.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/jixeremipet/cloth_diaper_pattern_template.pdfIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_b241be7d962049ef91d097e08ce3236a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/qcy_t5_price_in_bangladesh.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_b7800f4e37f24c17a215e3f3250ceb9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/abrahaminte_santhathikal_film_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/76917335353.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/xemajov.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_7c2a455f1ee24841a2791dd4e4c1c98f.pdf?index=trueIn 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_off0000f56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56D 5044 bytes
SHA-256: ebb64e638e5b22feb78e5862e1d5ffc863cc23ed49b7fd916aa3223c670f2e5b
font_01_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 11236 bytes
SHA-256: 74f151cf8e0a0c1d93ff05488ee4952b55a63c0f4dd6ece5de3988419462de56
font_02_sfnt_off00012cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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