Malicious PDF — malware analysis report

Static analysis result for SHA-256 11dc1d52286db2d9…

MALICIOUS

PDF

85.0 KB Created: 2021-09-05 02:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 42e9366027a5b383906fc320493f0684 SHA-1: 6f2045c0e10e507c77283516bed0f9ddb13aeb7e SHA-256: 11dc1d52286db2d9cc3eed544216e63bde4190e76d4181959b4d6952b42faf00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to various websites, many of which appear to be compromised CMS uploads, suggesting an attempt to lure users to malicious content. The primary attack pattern involves directing users to these compromised sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/de2a04785820c87cf852e8da21359aac/69585808609.pdf In PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/25589789398.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/po8mo5gmrq4dfoquvrd81k0h02/81961631130.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160842a56217a0---98026714994.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/730666362.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/39621157340.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/37969346702.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/duvavinejilexipixo.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16072e3d7c8e44---60064229601.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/xuseduzapekepafub.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/5784c59eaf8c2955c5cbd3b1f6a938e6/tigironijux.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/muzapefaleba.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8071a9bf84---55629428434.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/22915424007.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/52712109555.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/22049578135.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/65305805335.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/28916606975.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/824ab8a77490b0171b9f38d37575aa23/texabawufutibufululuruwef.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/40acbf6112141b75e62d75835d85eeec/43712363054.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/63153411643.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072236e9abdf---nisifofideke.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/0ea6816228bc5b6420543d768d050afa/sumer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=fabeln+tiere+eigenschaften+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_off0000e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 10896 bytes
SHA-256: 0dda62df873ac70f0755f3662ad6a883f08827a53992ca9ff9bcbeffac43d743
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 20724 bytes
SHA-256: adda6cc49d738fac0aaadd5b9c6adb785c714c0ed164e06fccc96acd45e96564
font_02_sfnt_off00012e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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