Malicious PDF — malware analysis report

Static analysis result for SHA-256 645d63bdbd9a5194…

MALICIOUS

PDF

87.3 KB Created: 2021-03-19 08:32:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: eddcf8f377d1bd292c3eb700512261b0 SHA-1: 3b966ec40fd1cc2fb1e9da70d39bdedb23d28c5b SHA-256: 645d63bdbd9a519485115528af5434ed74462857fe00eb18ecd0b165169affaa
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, a common tactic for distributing malware or conducting phishing campaigns. The embedded URLs point to suspicious domains, reinforcing the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://nipisod.ru/wix?keyword=elisif+the+fair+quest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463552/normal_5fd6804297a1b.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/domain_driven_design_eric_evans_book_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_603d7cc49f844.pdfIn PDF document text
    • http://securespot.ru/gamafomitwv4dl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_601e4b6a98661.pdfIn PDF document text
    • http://rupaduwovuw.getenjoyment.net/godubemagatifurazamufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530990/normal_5fcd510846615.pdfIn PDF document text
    • http://help-copyrighteamservice.com/how_to_edit_a_photo_using_paintsx694.pdfIn PDF document text
    • http://erogan24.website/shadow_over_innsmouth_summaryg1icy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460690/normal_6050d2309e0f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447265/normal_600b6b3e016af.pdfIn PDF document text
    • http://kositexujir.sportsontheweb.net/53569141362.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/cedula_rfc.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://uploads.strikinglycdn.com/files/f2e2f1a1-3515-4fe4-bc04-cfa0ee1dbb3b/paxul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b717df7d-8f49-449a-9157-8c98db802acd/97881877634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a50e68b2-1ff4-49b4-81a7-1f57ce1b961d/gapafavojamixaderid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f92c74d4-9391-490e-89b8-2d2497adfc09/58551774150.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_off00010ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE4 4604 bytes
SHA-256: 1b001c9e42ae4447f366a22d3dc870033bb1b8de53c0f6ce662f3487c776fd4b
font_01_sfnt_off00011c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C94 11076 bytes
SHA-256: b03cbcb304c9f8b7ec4e16637dbdc1194e4bfa4e57305bd46372225c26f2586d
font_02_sfnt_off00014260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14260 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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