Malicious PDF — malware analysis report

Static analysis result for SHA-256 8691212c1482c530…

MALICIOUS

PDF

74.8 KB Created: 2020-12-24 13:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9d82aeff612195da9f9ae2370de13fe4 SHA-1: 97acc016763568450356929481acdf3ffb4e6a48 SHA-256: 8691212c1482c530a206dfd797c412dd4eec72a04cb9a3b93d94c2f4cb04a592
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document and hosts a link farm of external PDFs. The embedded URL points to a website that appears to be part of a phishing or malware distribution scheme. While no scripts were directly extracted, the PDF structure and linked URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=work+completion+report+for+construction+project PDF link annotation
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/831556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f8892481bfbc.pdfIn PDF document text
    • https://fofevupug.weebly.com/uploads/1/3/4/4/134490210/f044ad1e0ece502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_5fb77048d52c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f92307a48a3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5fc06890a9d3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5f95241d21da7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_5fd65afe30204.pdfIn PDF document text
    • https://tupekado.weebly.com/uploads/1/3/4/5/134514551/6cc70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5f9f1b43a8ead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5f98b03a5c574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f97511fe7ed9.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/supefujoxopubu/woraloziwodolifinesumiwop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023bb176-2832-4114-ae8c-da8598ec9584/37486287067.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/lymphangitic_carcinomatosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77eb856a-bb00-45cb-a351-1c7351aeec58/56981196294.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_off0000e99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99E 5104 bytes
SHA-256: 9a5d5cb2d179f40d32b3c721fe9a34b544d7f1638680c1f70e57193053eddfde
font_01_sfnt_off0000fb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 10268 bytes
SHA-256: 6f01659079a734e265918829b4a9ae174e4ff011d76ce6622dc33ed4f03b9b11

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