Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a06e2dcd4cb00d…

MALICIOUS

PDF

72.3 KB Created: 2021-01-12 21:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d1b0c89ed248949e7cb37d3081af61d2 SHA-1: 770140118ec7016a05d5ba8563a3a08a04828346 SHA-256: b3a06e2dcd4cb00db7c30762e55279ce48eb4e55aa9b5b1f559b90778de5b800
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm attack. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with one pointing to 'https://s3.amazonaws.com/lezopobigeza/bhimavaram_bullodu_songs_doregama.pdf'. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to potentially harmful websites, aligning with a phishing or malicious content distribution strategy.

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://trafffe.ru/123?utm_term=grace+muriel+earhart+wikipedia PDF link annotation
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/sobugibada.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/VrVSll3/sanemijil.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/ggjbha1/94151358058.pdfIn PDF document text
    • https://site-1177029.mozfiles.com/files/1177029/96941606990.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/26082b208.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/drUhgjg/75635187990.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/bbhc9hF/smart_connector_ipad_air_3.pdfIn PDF document text
    • https://site-1176985.mozfiles.com/files/1176985/xasusudiwuzopaludax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420588/normal_5ff834398da09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530323/normal_5fd86ce1a3404.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
    • https://s3.amazonaws.com/lezopobigeza/bhimavaram_bullodu_songs_doregama.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/show_sport_live_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/2639995049.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/sistem_digestif_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/lujowusiputazomowaso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B2 4988 bytes
SHA-256: d99540a67d0ff529da7e4c1e87ae4c2a5721f097b3ab80fe997e697944ecf94a
font_01_sfnt_off0000e3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B5 10176 bytes
SHA-256: 06f82d7fa6fda0750e09dd6c09e69fd78fd57b4318f573015a0ed3ded899f242
font_02_sfnt_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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