Malicious PDF — malware analysis report

Static analysis result for SHA-256 804f8628490cbf20…

MALICIOUS

PDF

57.5 KB Created: 2020-12-14 21:16:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fee1965f7f4bbfd69f8439d701b20876 SHA-1: ecc3f8a017e47f056ef98ff8107714a71c1a7ffc SHA-256: 804f8628490cbf20479cd4d371a475fc766e983ff3410f88ed61a476d65cd4de
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains like weebly.com, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to lure users to external sites for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://trafficel.ru/123?utm_term=g6r-h4t5+remote+manual PDF link annotation
    • https://rivebopufu.weebly.com/uploads/1/3/4/6/134663658/1160836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fd25f987c9b0.pdfIn PDF document text
    • https://meramoginatazo.weebly.com/uploads/1/3/4/7/134733336/pekex-riziluvinabum-tuxenas-taxuwobuvo.pdfIn PDF document text
    • https://saxarewuvopa.weebly.com/uploads/1/3/4/8/134855039/jugiwu.pdfIn PDF document text
    • https://wumaluko.weebly.com/uploads/1/3/4/7/134716396/7905f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f8f6233d2463.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/07f8392be061dc.pdfIn PDF document text
    • https://kigekasomek.weebly.com/uploads/1/3/4/5/134598498/cecb003ed6.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/3a1e7529f5.pdfIn PDF document text
    • https://lulakoxefinadi.weebly.com/uploads/1/3/4/3/134332070/niturowugisene.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/dinilederu/wudutokaro.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_off0000a7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D2 5176 bytes
SHA-256: e046b7204dfb41d5a5c1381af4b2bbe542f046cb951739f942deea13dee149a7
font_01_sfnt_off0000b94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94D 9508 bytes
SHA-256: dd30ac9142765f8d815c15629f27d8a3a043f19dac25ae2b8d4c930222438cab

Open this report in the interactive analyzer, or submit your own file for analysis.