Malicious PDF — malware analysis report

Static analysis result for SHA-256 0473b009f33d50fe…

MALICIOUS

PDF

73.8 KB Created: 2020-12-04 11:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1a5ed93a0f4d7ef0f750b8d531bf1d90 SHA-1: ca5fa02adae4e1a8be74ac713c3a3ea7f82f56fe SHA-256: 0473b009f33d50fe9916308951025273b42d9eb4754f7dda707b8aff966b29b0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF link farm'. One of these links, 'https://trafficel.ru/strik?utm_term=shih+tzu+maltese+mix+puppies+for+sale+in+indiana', is directly embedded and points to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or hosting further malicious content. No scripts were extracted, but the structure suggests an attempt to manipulate search engine results or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/strik?utm_term=shih+tzu+maltese+mix+puppies+for+sale+in+indiana PDF link annotation
    • https://wajovojov.weebly.com/uploads/1/3/4/6/134652085/5141480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_5fbe194df179c.pdfIn PDF document text
    • https://wimejevufafej.weebly.com/uploads/1/3/4/3/134379448/dafca1.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/5818370.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf54807acac6192ab7a3a1/1606374529457/8665018150.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fc338c3f3de5e49b5ccbdfd/1606629571696/wekolurinimumuriletowupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/029f3c75-50ed-439f-8b8d-ec1c022a34f2/chemistry_a_molecular_approach_third_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c66a059b-8282-4b25-b950-e28da1a6a5be/watifowute.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1b78f3de5e49b52ca5c4/1606294393588/examples_of_asylum_withdrawal_letters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5924c15b-38d8-4c34-a184-6c92fbd2f019/pasodona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d03d18a7-5209-48d0-90b1-86005d6f3df3/sikanutudorakedaburagome.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
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC195 5384 bytes
SHA-256: f15670ab4bbc6805db60d8edd1cd7243decc16396f53eee342bcccf15bc4b442
font_01_sfnt_off0000d3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C4 8748 bytes
SHA-256: e48f903f4ab3a3bb3dc5fbb4a546d6be6b7f1da90d14522ff33dc00c28684b29
font_02_sfnt_off0000e4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F6 11692 bytes
SHA-256: f99ad3fb1aac00d1ebf6c6e34f97d86d72d879c773676b7898e08a3d7e65697a
font_03_sfnt_off000109e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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