Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c42c2d6ad5d735…

MALICIOUS

PDF

71.0 KB Created: 2020-12-18 14:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 08e48a3e2e18105b1b307c7aec70b287 SHA-1: 7217ddabf9ffb6fd130d55b8793768af4d0ebd63 SHA-256: f0c42c2d6ad5d7355226f76d9d6036d430e7952b4ebab0e424a16985be111f28
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate it is a malicious redirector and part of a link farm, suggesting an attempt to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffmen.ru/123?utm_term=error+code+311+watch+espn In PDF document text
    • https://repitosa.weebly.com/uploads/1/3/2/6/132681506/pogepodesiref.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/jegubu-jofifed-busituwinenun-vulufubeva.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/5350708.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/7498156.pdfIn PDF document text
    • https://xozavakude.weebly.com/uploads/1/3/4/5/134581018/gosobenif-puxezele-walapanubid.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/5583335.pdfIn PDF document text
    • https://zupawifotifawe.weebly.com/uploads/1/3/4/4/134480263/fapevi-sexatu-lebepe.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/sokurinom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc971c8c741314319700/t/5fc6c5a88f0796361563e426/1606862248853/zombie_roadkill_3d_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/cfa_institute_research_challenge_report_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfedb73299f0c543a42aa/1606221532543/master_cerebral_piercing.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/sample_answer_introduce_yourself_job_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6dd568-ae69-42d7-a43e-a08df4537b34/the_navy_chief_creed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79084633934501854b92a/t/5fd683d8df2f0204c23be1f5/1607893976985/determination_of_ascorbic_acid_lab_report.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c05eb8467722f1ec93c2/t/5fce45177ae85b53b2bfa835/1607353624108/misiru.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_off0000d757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD757 5396 bytes
SHA-256: d1e86efe1e84db268da35a63a36d37b5e03a360645bfb629bea9315fd7c212c1
font_01_sfnt_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 11144 bytes
SHA-256: 56c068f20434d67c9004e25dca8cf83c2db9d8d3bc42a2ffea6ab96f60d98748

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