Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ed38f1807965bc…

MALICIOUS

PDF

72.5 KB Created: 2020-12-10 13:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 13d46abcd5a344b99e6a9b0036df1375 SHA-1: d3421ee4e62d54dc427463f440ad0921f8f213ba SHA-256: 98ed38f1807965bce4b2705cc51840e965f3e2b1c969c89d472ff7d10b95e95a
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/aws?utm_term=fastsave+for+instagram+apk+uptodown PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476938/normal_5fae95c377dba.pdfIn PDF document text
    • https://kalulexo.weebly.com/uploads/1/3/4/6/134661683/69d7c914051d0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f9a29ab113a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5fbdc8555f06d.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/vubotetuforum-nopeda-bonos-dejokomovenizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5f9f289b312c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443341/normal_5fc78cfd934db.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/5fc115d62bbd7406580792b0/t/5fc1bd953570fb44d143aef6/1606532501735/tubuzafiteloko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c28a708-fbbc-4fa1-9605-b3371855922b/xelukepipok.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/16616932460.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000b75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB75F 6416 bytes
SHA-256: 2a69545f8a9d104697b847a0f548493cbc920d2d91a2c508c9ca03512f8941e1
font_01_sfnt_off0000c729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC729 5500 bytes
SHA-256: a554c40ab78fcc21459a3fdcf300aa84d67a7c5385ce830b527729c0df078b67
font_02_sfnt_off0000d9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9ED 10908 bytes
SHA-256: 2aca8508c3def172070ff0582bfa5df38415b6a72a9475c5454d713a9d71c3be
font_03_sfnt_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 16228 bytes
SHA-256: 3b1a510bb104d15d49c7e27411e4a765997f8ec4283dd30c57ae2015bdf30823

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