Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c9989b143ad339…

MALICIOUS

PDF

77.4 KB Created: 2021-02-07 12:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bcc11db28bcde59ea4a41fc613a7ce2c SHA-1: 5cf7c35f9d62f4dd0da66acd08b8b3060056ddb8 SHA-256: d2c9989b143ad33959dcea30cc78d23190be3fdb23547d4d6f3a52b42b1030a3
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many pointing to disposable hosting services, and is identified as a link farm. The presence of external URIs and its classification as a phishing trojan suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/123?utm_term=ap+human+geography+centrifugal+force+frq PDF link annotation
    • https://wixevilit.weebly.com/uploads/1/3/4/8/134873569/8921527.pdfIn PDF document text
    • https://fosijegaden.weebly.com/uploads/1/3/4/8/134868146/1714093.pdfIn PDF document text
    • https://pemilixip.weebly.com/uploads/1/3/5/3/135330450/b2159cbe.pdfIn PDF document text
    • http://triple-doska6.club/451461185586fay1.pdfIn PDF document text
    • https://xidelesa.weebly.com/uploads/1/3/4/4/134498911/wikakikosexowur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492593/normal_601f8612cb34e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450158/normal_5fdff62c4f451.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/c4a22f18c3b.pdfIn PDF document text
    • http://fajutixosisi.22web.org/92493544354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_601f56b64a53b.pdfIn PDF document text
    • http://moreprodukti.com/pafukekopnzr5x.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/9799756.pdfIn PDF document text
    • http://olymp-trade.top/nilisatigcoem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwalolerede.epizy.com/23541892406.pdfIn PDF document text
    • http://zofududa.rf.gd/28992228790.pdfIn PDF document text
    • http://judewal.rf.gd/learnsmart_labs_biology_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE758 5468 bytes
SHA-256: 60741f6c1ba7b373fdc415ae13fcce89205187fbccd3bf7fb681668f5631bde4
font_01_sfnt_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 1716 bytes
SHA-256: c0e39f44321a474cc328806e737293db5bfd2873d0430c567f64257ef24eb06f
font_02_sfnt_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 11628 bytes
SHA-256: b3468e617794978be8d3453a3461e731958d242055543025fc5336d11679f2e6

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