Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4a80290630dc2a…

MALICIOUS

PDF

111.6 KB Created: 2021-01-11 13:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a3b50f9e91d48733179cf591ba319bc1 SHA-1: e2351b30d412f9c51037baef30a5acf4a3eb712d SHA-256: 4a4a80290630dc2ae1880d6b94c5fbe361ce262a9634c10f057d2daf52c472dd
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, directing users to potentially malicious domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://trafffe.ru/aws?utm_term=foe+great+buildings+guide PDF link annotation
    • https://cdn.sqhk.co/wadusazilox/ifoijhe/jumping_dinosaur_hacks.pdfIn PDF document text
    • https://menaxogem.weebly.com/uploads/1/3/4/4/134432074/buwijupazuf-wujel-furob.pdfIn PDF document text
    • https://dizazulebor.weebly.com/uploads/1/3/4/8/134882555/2d2ae92fc13db.pdfIn PDF document text
    • https://valutakawewa.weebly.com/uploads/1/3/1/3/131378791/1954270.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/ha1difi/absorption_costing_vs_variable_costing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/lomogas/93747956513.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/fitbit_charge_2_manual_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/detiluju.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/poorman_sql_formatter_ssms_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/44484082006.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/xiwuvejubo.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/prokaryotic_and_eukaryotic_cell_division_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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15813 5088 bytes
SHA-256: 061b074977ba77cffaa86c5a96e8af09578ee32c83416c45940799c4895b824f
font_01_sfnt_off00016967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16967 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off000174ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174CA 11060 bytes
SHA-256: 94c9f52a8da072321df8c22d472dee539b4aca491273557ec2889b12893212a0
font_03_sfnt_off00019a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A26 6756 bytes
SHA-256: 5ae11a89058458d6566178b02b8bc83b250c6c3f5404c6d41f22358b3eeb3a1c

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