Malicious PDF — malware analysis report

Static analysis result for SHA-256 79eb43268162f51d…

MALICIOUS

PDF

89.2 KB Created: 2021-06-25 20:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3330b4d32a05341185d44373c7553c44 SHA-1: 00540fdc7e22031afd28ab00b571363b25447d65 SHA-256: 79eb43268162f51d85a0f661a5f2d3a2e57a0f0bb68577b47d148d84b1f35e05
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malware. The presence of a 'download' button lure further supports a malicious intent to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=moses+1995+full+movie+download
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fb5cf1531---mizuwadididozuwogarifizas.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be05454456a---2254023724.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a5062b3c1---gegixaxorawozeparuri.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160aee4db5f7b6---nebof.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d8b3c9236---2327648484.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/u0ahqu7rbi2140evqiph3los89/13614322515.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a644bd808ee---kilenuwu.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a64d4e6f807---32899145004.pdf
    • https://kisikana.hr/userfiles/file/45060514965.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/bd9500581a7271b459ac1dd960231c52/80719498913.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6e267f0d5ee87571c47f6eadb84f8793/59990133580.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/2ce6551630ea5da2f593701a880b86ce/3691631333.pdf
    • https://avela.md/userfiles/file/45233999000.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c259ac900---18402679759.pdf
    • https://systematix.pl/userfiles/file/83014446051.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7f74a10bf---kotowe.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/pr5a6mq7sk3421f4k8hvh0j8ti/34816359597.pdf
    • http://almar-bus.pl/userfiles/file/wevud.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6799632d---75884162984.pdf
    • http://h-st.nl/bestanden/files/dutaralakulisusa.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081ad6dac9c0---kaxegatijakanavujepov.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/dmkpr20v63uhjl32c4h567sh2e/pinefojadane.pdf
    • http://everest-c.ru/ckfinder/userfiles/files/morivesitogusotifesozux.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/02b4dd1228fbcec3e4e5c04c30ab0442/56446321254.pdf
    • http://jjmcp.jp/userfiles/Image/file/24267338447.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f978.bin
256c14fb0c54f18d0668f5c32203a96822ada0436a1cf528729954950d00d3f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 10916 bytes
font_01_sfnt_off000112ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112EC 16792 bytes
font_02_sfnt_off00012afe.bin
d12997de730b3025c5bab0224e28a5294e7c8be06d483d2eae5e408f9ad57066
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFE 17116 bytes