Malicious PDF — malware analysis report

Static analysis result for SHA-256 925054eba9279359…

MALICIOUS

PDF

80.3 KB Created: 2021-02-02 09:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a7e7d360a3be1d748b168d31eb252cc6 SHA-1: e7ab7d2b556febb71e9ca5dba7ddee8c0e80b119 SHA-256: 925054eba92793595bd92f3c20f95caa69eb41776df4a0f0c2faa4180192cb30
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 0.9996

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://crophysi.ru/aws?utm_term=mobogenie+apps+and+games PDF link annotation
    • http://kopolebukerone.iblogger.org/mejizu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5ff40fe6a3909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457000/normal_6013aa4f95925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368760/normal_5feda0a6db842.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493550/normal_5ff27873a851a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450038/normal_60069f00bdd76.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/idWibgf/79858281321.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/HhivQSK/teaching_assistant_in_florida.pdfIn PDF document text
    • https://pegogelixuj.weebly.com/uploads/1/3/0/8/130813965/bexejus.pdfIn PDF document text
    • https://ketokaxuvora.weebly.com/uploads/1/3/1/8/131856042/tuwado.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/SqpTJhh/12361713650.pdfIn PDF document text
    • https://nojemalof.weebly.com/uploads/1/3/0/8/130873850/4e3e29a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_60155a7a97ee8.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzabajixiw/fK7fyo7/44106131829.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/fjijqe5/91478836227.pdfIn PDF document text
    • https://popoxalisasuper.weebly.com/uploads/1/3/0/7/130775362/8582302.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495860/normal_5ffebe2763daf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://talagolow.rf.gd/auslogic_boostspeed_10_crack.pdfIn PDF document text
    • http://pugunexipidil.rf.gd/vevuxerifapovijuwilatiba.pdfIn PDF document text
    • http://nosifunugiwes.epizy.com/jsw_gi_sheet_dealers_in_bangalore.pdfIn PDF document text
    • http://kubatejabudebuj.rf.gd/police_report_waco_tx.pdfIn PDF document text
    • http://dupevinituz.epizy.com/baxi_megaflo_32_system_boiler_manual.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_off0000fc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8D 5296 bytes
SHA-256: e740ef4c82dae419622ecac0c7e76fed958c6f68bab8fd98dcff8a59d5c98af7
font_01_sfnt_off00010e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E87 10924 bytes
SHA-256: 1326b3a14f36e752bb764cd6b0f8f268f62c3620422caa8ca2c658cc97f6f7c8

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