Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b220cb0496264e…

MALICIOUS

PDF

68.2 KB Created: 2021-01-09 23:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1d4fdd23da1d72edccae6527ce82ca64 SHA-1: 3357eb623b84439a834a5573ab7ba30d6c93d57a SHA-256: 06b220cb0496264e0f93b90aaa923bfb9a866510b6fc2b2c5410695e45ab1af0
252 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of links, many pointing to disposable hosting, and at least one link directs to known malicious redirector infrastructure. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure, but the overall structure indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/aws?utm_term=frigidaire+ice+maker+repair+guide In PDF document text
    • https://site-1177540.mozfiles.com/files/1177540/pirate_king_apk_full_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412773/normal_5f98711084ce2.pdfIn PDF document text
    • https://site-1178359.mozfiles.com/files/1178359/blue_bloods_new_season_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470040/normal_5fd78f57de816.pdfIn PDF document text
    • https://site-1226593.mozfiles.com/files/1226593/free_casino_no_downloads.pdfIn PDF document text
    • https://bugalesatu.weebly.com/uploads/1/3/4/3/134309104/wasuxazizazogozejil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481072/normal_5fd18cd8089d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425514/normal_5fc73161c8ae8.pdfIn PDF document text
    • https://site-1177800.mozfiles.com/files/1177800/88464909908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_5fb59f7cc0aa5.pdfIn PDF document text
    • https://tevutilig.weebly.com/uploads/1/3/4/5/134585367/bukumivizasid_beregonix_bilokobidugoje_bazexuzefip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f9fa12669559.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/xapota/18533179902.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/purpose_of_conclusion_in_research_report.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_off0000d06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06B 5204 bytes
SHA-256: 303274d05662b239ed46fcd4ab2353bbc5677b175268f60fa3c74c68cfc80ba0
font_01_sfnt_off0000e210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE210 9956 bytes
SHA-256: 12149193e764c795045cd539862fb4dc5e9274f1d0cafe49adcd01a2ae1adc10

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