Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a933e9435bc66a…

MALICIOUS

PDF

86.3 KB Created: 2021-06-28 07:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 69dc575d5c54ec93e1e2171a50e51d0d SHA-1: 276de3788785119dbd219a8f8f5c6f8854c66c44 SHA-256: 34a933e9435bc66a4288f7201fd45335e2d86f29742d844e3311511df01d4615
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of a QR code lure further supports the phishing pretext. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/ah91jq0cl5cfmt7lk0qkvgh19o/43696251842.pdf In PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/75891012ff52f97e13586f726c253629/71864688514.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ee1a54a30ee33f5aa24a0aac1529cec2/86170174865.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/24754975725.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/sedokinosodedudebejawolo.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb763b0b1e---pegegekabuzeluz.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/64341438207.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160881a1641423---68201924956.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a556e75bda4---77230474992.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/77273176421.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/56a5419764f3f3c9a87b74b150d9d1b1/sujuwagukiposukutim.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609461cd9b7ca---mepufosasuniwukidowakozed.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/75026842342.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/lapexobikedugisixapa.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/15071408976.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/vesoxavafenebotarawiz.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/76855300772.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a460ff2a800---28858392505.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/5e4591eb632b4240957384e627d6a370/gulegivaviluvaxiwug.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/bb0b2905bf3bd694c127daa4a60bfbb9/93531719416.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/89j9vdmol975ikvivn67or3e0o/vefisijepinajogirej.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/ec04f3b449595c2c06db75c061def77d/46124953481.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091eb9f1b138---75566224561.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=a+contract+with+god+pdfPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 10620 bytes
SHA-256: f476eda29a51777a5a3df0f9294bd570a848409d0290b59850db3148c43074a7
font_01_sfnt_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001202a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202A 16484 bytes
SHA-256: 0e5b74934052f190f23c6b300a7e0dd40f3da8477e8fe2b75a0404633e45b0d7

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