Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f741d0e2ab337d…

MALICIOUS

PDF

106.7 KB Created: 2021-08-17 05:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7150bc0d7c56e8a73db6e99f4bce7ae SHA-1: 302ac2ac97388d0fe6246b3ef2a6f6ca230aae67 SHA-256: 22f741d0e2ab337d01301f2dafffa9b9c497a1e319e9454394c166dbc00e8bb0
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://sangiorgioautoservizi.com/userfiles/files/70154424218.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083a22a8581c---xulinedanuzi.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/33mtfj9ed4ip326pmt8vs8c263/29487463152.pdf
    • https://permargi.com/files/galeria/files/68354130765.pdf
    • http://upservice.expert/admin/ckfinder/userfiles/files/27157995468.pdf
    • https://soudurelauziere.com/upload/editor/file/dawozakuvevujokixik.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160838927d4634---66375591616.pdf
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/88576069755.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/592ce2019f981e6d8115f5e7823fe03f/tonirawudulubirow.pdf
    • http://domesticsolutionsagency.com/userfiles/file/dujemudapipekojituxixa.pdf
    • http://diamant-x.sk/UserFiles/file/68458107907.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/8a4fd480d275a0f32f2005f2bb402e0f/16087088188.pdf
    • http://hepiran.com/cache/fck_files/file/gojexerumi.pdf
    • http://medica-eg.com/userfiles/file/5483216219.pdf
    • http://labonguyenhoang.com/img-chamthi/files/bedojomikategulej.pdf
    • http://gps-tw.com/CKEdit/upload/files/9786184254.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/r3k3htm7ghnij1ua1b1rp1u3gq/fuvatosazuseka.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c03a48b37---41175322744.pdf
    • http://scamps.biz/userfiles/file/6708879334.pdf
    • http://clinicaveterinariagussago.com/userfiles/files/91873729771.pdf
    • http://applexin.com/ttpsea/files/file/78594316017.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/suhbblu74ooetdpjfnm2p608rd/79503517784.pdf
    • http://sun-green.nl/ckfinder/userfiles/files/85071638240.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/b9993b20f925cb72ed76897749276af2/bakap.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/7th8gmaen4k19e9vdllvh9obvp/81025936615.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=dbt+wise+mind+accepts+worksheet
    • 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_off00013bdd.bin
68510892cc5385de5f6ed44c8ada0feaacc0306128085d1f74a1eb154ee146c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BDD 17412 bytes
font_01_sfnt_off000169ba.bin
9bbbd255c8586f1a7fbc8214b36330cf7deaae99d6e3ea259bc15af586a0db33
pdf-font-stream PDF embedded font (sfnt) at offset 0x169BA 11052 bytes
font_02_sfnt_off00018324.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18324 16792 bytes