Malicious PDF — malware analysis report

Static analysis result for SHA-256 9915c6f6e427307a…

MALICIOUS

PDF

249.8 KB Created: 2021-06-25 00:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 754283ca95548737959aff881e41865e SHA-1: 43f35ff27019ed419d94e993e0b6df0544565105 SHA-256: 9915c6f6e427307ade300b75e743d0e199155048e80dc9a6cddfe7b8a6699e09
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains heuristics indicating it is a phishing lure, specifically requesting recovery secrets or private keys. It also contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing campaign. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. 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 http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d86b0a7335---mikojewekebopawozikabij.pdf In PDF document text
    • https://bdsvieclam.com/upload/files/46680396712.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799e2647e16---wusapizejobirowaf.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2911a48f6---wogusafizapikuwuviduri.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/22690108833.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/568919d051af0b01bc9bd1c92aa54d30/15907312760.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/99dac630b89d8d37244d666bf0ea1c92/27511298743.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/84497637136.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/5bepid72tgn88a5e0h70i97cb4/paseregipipabasanad.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d19d5297d0---maxosojiwozuzaxokoludus.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160aa647859fc3---jifazu.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d48182f007---tesisu.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/monijoxudexetuxunut.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/tixeritigabivotunenetinaw.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://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=act+form+z15+answer+keyPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00039144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39144 5208 bytes
SHA-256: 7e50754a3110fad897c01164bcf6ae02e988a37890562dfaa15f69f6bc712069
font_01_sfnt_off0003a2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A2FA 11776 bytes
SHA-256: e65cd44bb79e991856c83ef9459d7c4a8015496a2e8e380e67111c95d4e0afb4
font_02_sfnt_off0003cab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CAB7 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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