Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ce03bc4d5dea77…

MALICIOUS

PDF

119.2 KB Created: 2020-12-05 08:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c4f33a8b219e2c7a7db751959f61ee28 SHA-1: 6a4ac3f27db23180cb9666d91beed6411b35c135 SHA-256: c4ce03bc4d5dea77684c97df5207b14ada48e0a834e78e9e0ada06e0b0f44e21
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9999

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=cookie+clicker+farm+achievements PDF link annotation
    • https://kumapeforurimo.weebly.com/uploads/1/3/4/6/134664671/wujamamiralatal.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/cc2041ca0b5.pdfIn PDF document text
    • https://bitekiparoduj.weebly.com/uploads/1/3/4/0/134017536/renoxavuv_vebev_xamozumavubu.pdfIn PDF document text
    • https://mosuzikovadapa.weebly.com/uploads/1/3/4/6/134667275/xufolakerumu.pdfIn PDF document text
    • https://jawifimubagibe.weebly.com/uploads/1/3/4/3/134310986/lotowu.pdfIn PDF document text
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/ed06914c0e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f70780-9e10-490d-8755-276a9491dcea/gorilofukipewedigidoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00cb19d-dac6-4df1-8366-96b6b96f16d5/this_old_man.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59cc6429-cd80-4e7a-8268-43e78f300d4d/bejuxifikufaxebajobofig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35765739-ed4e-4c1b-afec-83627288197e/88236731562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a711562-41fd-4a5c-826c-9fe5558e0044/pasture_lease_agreement_kansas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ffc87c2-5fda-4cbe-a116-176d81f635d3/jobos_puerto_rico.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/majutifavamexi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C8D 5148 bytes
SHA-256: 82572953e460931611e0103efb6fa3125a2b80a1f0a47c22e3e88aae4a3bd76b
font_01_sfnt_off00019dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DEE 15012 bytes
SHA-256: 44964e4cbebbe7a97c50584af8ee77d41ed56fdbdd6107b931e1cdb4b59738bb

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