Malicious PDF — malware analysis report

Static analysis result for SHA-256 e691550a76c37e92…

MALICIOUS

PDF

67.2 KB Created: 2021-01-07 05:32:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f8555ff07c2a1d2d719df404b6aa174a SHA-1: b26f236b18beb5f917046e5704bb22c42f7ad75b SHA-256: e691550a76c37e92c0177b05415ef5229dd8599626a8c264e202134b9bde3bb3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external links, 'https://trafficel.ru/123?utm_term=micro+touch+max+hair+trimmer', is suspicious and likely leads to a malicious site. The ClamAV detection and ML classifier further indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=micro+touch+max+hair+trimmer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470979/normal_5fe4cba17c378.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/5fid5iZ/64127126107.pdfIn PDF document text
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/ponunamapodufaj_wodogolilapuv_xekaj.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/1fd42.pdfIn PDF document text
    • https://fowexukemaxoz.weebly.com/uploads/1/3/4/3/134369940/217be7197c3c.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/muvarelo/distributive_property_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/57414385295.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/75322130765.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/boomkin_guide_8._1._5.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/cyclone_installer_v1._22.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/analysis_essay_example.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/59492707302.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/acdc_best_of_album.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AD 4904 bytes
SHA-256: d7bb6c86687f10fcc52decca6d6a607873990a00c15c484db07f44302c7c979a
font_01_sfnt_off0000d435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD435 1648 bytes
SHA-256: 56a66f4a8fd4cd0ebfa62244f9c936c53d5e30ab3c2e0f7e9dd22f7372ebd1f4
font_02_sfnt_off0000dc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 10180 bytes
SHA-256: 2e45b07811a57f71918f121087e21f94bee8610f6e512771a7b2d9bff767b12c

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