Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27e111ec12ba1c0…

MALICIOUS

PDF

79.3 KB Created: 2020-12-11 02:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d0af93d96f0d5ec377ae5249048ebd36 SHA-1: d7de79b5564cb78e52f43413eebeb2bd954e0679 SHA-256: e27e111ec12ba1c092859592004c347cef82fe72d880235cd955a882a9d288d8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=cob+grow+light+kit PDF link annotation
    • https://vidasukesidi.weebly.com/uploads/1/3/4/7/134731400/22547.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/rowitadari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5fd2a1d50063d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412160/normal_5f9778cb535ff.pdfIn PDF document text
    • https://koxubabu.weebly.com/uploads/1/3/4/3/134314291/3755786f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f871a8e3f9b5.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/pevuke-tamure-xobusifug.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/xalasawu/florida_financial_affidavit_fillable_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/guide_du_routard_normandie_cotentin.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/virulence_factors_of_bacteria.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/fabarozuzebaked.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/53074050743.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A1 4440 bytes
SHA-256: 3ab3f982dc786a81e6d6ca997ed52156147b7ea453d1df42178081422766e5a3
font_01_sfnt_off0000f5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D5 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000fe63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE63 10360 bytes
SHA-256: 5b9f99d9563434a1d2a3ae686b16772520572b5f46b15ba34324f04466785a35
font_03_sfnt_off000121e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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