Malicious PDF — malware analysis report

Static analysis result for SHA-256 9362c795dc32ab20…

MALICIOUS

PDF

82.1 KB Created: 2021-08-11 14:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 03ab2e9efd0cd63f6079227b2f6278c7 SHA-1: 659dd1e54e12123a294adb5952cf8c20514ce88f SHA-256: 9362c795dc32ab202b10b7927705288a2892aac58bef57826249632d410df771
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of an IP address literal in a URI further indicates a suspicious attempt to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ildiko-szepsegszalon.hu/userfiles/file/88672992170.pdf In PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/6ld1dl3atr1bf99p2usoblqevb/rebuvifugogosa.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/ganexiv.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/4b910f572c0a65cacc402676746f3b22/76585205493.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/408cd84418c9377172a7abd15db81c52/buxisisezekibe.pdfIn PDF document text
    • https://aneri12.eu/res/file/78341828042.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/23609859705.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/98345711648.pdfIn PDF document text
    • https://whitesal.com/data/images/file/2931_20210702005006.pdfIn PDF document text
    • http://thedigitalscorecard.com/userfiles/files/kojilokajinitafoga.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/96322884152.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/kipadomelawiwixageb.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/13246611124.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/82246486108.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fd7863cc6---difexifako.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/34882087531.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/017d34a6300ca59e1829ce806e8782b1/8616664716.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/7289592566.pdfIn PDF document text
    • http://52.74.160.208/ckfinder/userfiles/files/7188170606.pdfPDF link annotation
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/cq7dvtask94f7ip9huiqeq5ag6/92576775701.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/86b2ce0f19ee169571e9dafaf0ec5108/zozosotedenupatisulev.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/807af7e976482681c64fe71575c5fac6/58612355635.pdfIn PDF document text
    • http://calisnt.com/uploads/files/donosarufojo.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/9901e0da950ce715e49bede9b4a70aa8/pewam.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/f6a0ba9a851c2d717704409b9770853e/diluzofozilesidu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=adjectif+qualificatif+exercice+ce2+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 10800 bytes
SHA-256: 42d6e87f94637c962475bad87d76af2bc4e098b59139f4c108a601d64d869096
font_01_sfnt_off0000f0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DC 19692 bytes
SHA-256: fc3f2fb4359d80b631b979d8d99eda041acaad8c7825710ed38500e114b6deef
font_02_sfnt_off00012288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12288 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1