Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3dfb46874e1fcd…

MALICIOUS

PDF

77.0 KB Created: 2021-03-03 17:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0809c6342cd5d5ed085e565e5605d8d0 SHA-1: 4b1959ab9b11c02c0835ee72ec6d1739c69a6341 SHA-256: dd3dfb46874e1fcdaba6d18f26ad46352a16ba00435bf46a62fbb7e63be65c6b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO spamming operation. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest a phishing or malicious redirection scheme, potentially using JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/award?keyword=how+do+you+read+a+stock+chart PDF link annotation
    • https://dominisu.weebly.com/uploads/1/3/1/3/131379959/nevixuwiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506200/normal_6002ea677be7a.pdfIn PDF document text
    • http://islandlandscapesbb.com/aloth_romance_guidevdiv5.pdfIn PDF document text
    • https://jekosupoma.weebly.com/uploads/1/3/1/6/131637113/jovodisusage.pdfIn PDF document text
    • http://meetraisins.club/60653691298xqcgz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381543/normal_5fe444aab123d.pdfIn PDF document text
    • http://lnstagramoriginal.com/zudiwiwedusikupof6hun8.pdfIn PDF document text
    • https://tawedituja.weebly.com/uploads/1/3/4/8/134864040/be11e.pdfIn PDF document text
    • https://wabuxopimigom.weebly.com/uploads/1/3/4/0/134042903/kisiwidutopamire.pdfIn PDF document text
    • http://umkatrade.ru/romawexajagowidigumeguvk7lt3.pdfIn PDF document text
    • https://dirotazu.weebly.com/uploads/1/3/1/0/131070105/3210593.pdfIn PDF document text
    • https://pewidujatiw.weebly.com/uploads/1/3/1/3/131381722/fijigebawitidikifav.pdfIn PDF document text
    • http://digitalmicroteter.xyz/zemobutidixprxhz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449771/normal_5ff9692649f1e.pdfIn PDF document text
    • https://vezinamitin.weebly.com/uploads/1/3/5/9/135984824/topese-gikivejevanagox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_60221827ae392.pdfIn PDF document text
    • https://rurirenaw.weebly.com/uploads/1/3/4/6/134652156/9472565.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://zatajuvezutulo.rf.gd/electrochemical_cells_virtual_activity_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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 4944 bytes
SHA-256: 0fd2cba3e7b826dc2bf0f5e4f0dd0561b7feed02fc223782c6c40d634d3b21bf
font_01_sfnt_off0000f6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B0 10076 bytes
SHA-256: 7b8c9302ff5a80d0485c6d1652740a536e7222356cb32ea02b3b947050a1c0bc
font_02_sfnt_off00011920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11920 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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