Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffacdd80cd52f2a8…

MALICIOUS

PDF

71.1 KB Created: 2021-02-21 18:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eba5015b8a1bae8639c4a08596ae7f9a SHA-1: 94266bc5e1a6ce42ea49c63bafa01cb5b47a461f SHA-256: ffacdd80cd52f2a858f6ec9149bacddc1c4f31237f3281ec9abc7dd1d9776f76
156 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. 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 0.9998

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
  • 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://maypoin.ru/wix?keyword=ny+driver%2527s+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4506159/normal_5fdc0fe8e3ad9.pdfIn PDF document text
    • http://xeresorejal.iblogger.org/allah_allah_tarif_teri_song_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/xamapetarel/idVOHhe/bekid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418796/normal_5fea3852dfa36.pdfIn PDF document text
    • https://cdn.sqhk.co/semoxumid/BOFha43/xarulepaxadaka.pdfIn PDF document text
    • https://cdn.sqhk.co/zevukodixu/jhljcMq/kozejepezanezotibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_6016c78398e58.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/gggc6oj/80078399694.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5feb4f797b163.pdfIn PDF document text
    • https://cdn.sqhk.co/tezabulaw/jbdD9mB/cut_the_cake_songs_for_wedding.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/a5a55He/lupituxowemezojilis.pdfIn PDF document text
    • https://xadupokunarufi.weebly.com/uploads/1/3/2/7/132710624/zesade_kesaragir_busojiniti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_601886e518e39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC21 5044 bytes
SHA-256: e84cebd3fb4cb66adcc4eb646d40e6b57a8a5967e7eb997040bc5fa9bfdbe37d
font_01_sfnt_off0000dd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 10704 bytes
SHA-256: 29a7b32c59220450d6de5b2dd6c714fd58773d0d0861cf99d5e605160a21fbd1
font_02_sfnt_off0001019a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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