Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f39aa39918bf776…

MALICIOUS

PDF

155.9 KB Created: 2021-07-21 02:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a363b8305b91ff11be21a6659650c66a SHA-1: f65bc4657d135f088c541ea89bb611cbe4880b37 SHA-256: 5f39aa39918bf7763bd66507461e49031b220bd8febe6d7e40aa205bf42c38ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9561

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
  • 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.
  • 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://abe-rdc.com/userfiles/file/budalan.pdf In PDF document text
    • http://tulga.ru/editor/files/14674729093.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609084b3ea215---74928349990.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/xukikunumorefagula.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/12121252201.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/tigofutira.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c89be958fb3---58209935462.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/9d3280723d11d5a2ab6b09d06e65cb84/26270755790.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/34025973528.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/80049014240.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f1a87b8a2a68bc3c091f045bc87623cf/48185179212.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748b019e88e---xarixoxefazejupaf.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/6ov4mdnptigpql4o5umr715fe0/duzukamilegozedolubal.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/mokimuwegagezaloridat.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/f522d6f1d6a4c84650ce106a689b6be9/lixifodexametananop.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b00e8512072---73820168625.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160790a2758c3e---laxenipomutidujope.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/04f76a6932cc7bce43270abf28559e9c/legogovomitunepevap.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/n05hvmsbhegrk4lnfr4aau2o6a/xidege.pdfIn PDF document text
    • http://armanetti.com/images/85046917749.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/49750597550.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/4d0ab21cda17fe3326b3d2ff9b75f110/zerufiliwem.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a994198d4d---45124902452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+fate+of+the+furious+8+full+movie+subtitle+indonesiaPDF 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0002449b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2449B 17960 bytes
SHA-256: 52acac7be7da9e9654129c6cb5d02be298248702114fe0ea1bf7dfd891aae096
font_00_sfnt_off0001c124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C124 28936 bytes
SHA-256: 5a589fd7348fa07c2b08974640ace67f45954891f09efb3f7772a497572af1d1
font_01_sfnt_off000208e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x208E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000220f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x220F1 2296 bytes
SHA-256: 0d91b93c30cdb4b9fcc5287ef31e0f6d3b75050094e35c3303e90e7f2c1d387e
font_03_sfnt_off00022af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22AF1 11096 bytes
SHA-256: f9dee3cec4575c94ffe1b2a820ab3a7d7141a3a5d7085ff55113c0169b4e09f8

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