Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4afb09d5f4816d…

MALICIOUS

PDF

75.0 KB Created: 2021-08-05 07:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: efcaa757ad672fe54eb61c66f5e9830f SHA-1: 911f41189e24ebcba3829505d523c243fa4520b7 SHA-256: 3d4afb09d5f4816da8f92af09489c329e87f7b58293306b7bf27f9bb13fcfc2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://oniceh.ru/uplcv?utm_term=hangover+kick+free+mp3+download PDF link annotation
    • http://amatnieks.com/pictures/image/45291574160.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/54430174302.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/33766910287.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/ee2c2ec93a990887a16f8ded71a8cabb/47988553866.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/wagoran.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/kozisoriwatirevote.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/78972185608.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/48b66a76b92bae296b4d141741a95364/xotisotapatonodesifeg.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751ec1e9a98---61552504722.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///72539703006.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079338f55e39---55766428562.pdfIn PDF document text
    • https://digicpictures.com/downloads/32415101462.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c38a8d22c---45892770795.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/867b9627b8396afbdec1054cce6a845b/jaruxigiwojeturemekokoxa.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c967c4da4ca---75972982587.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/wufitekaxoxajokunuzexi.pdfIn PDF document text
    • http://suttonoakfarms.com/clients/880813/File/jaxadusiwomuzudumobewode.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/kudoxovodugitidol.pdfIn PDF document text
    • http://autofulltravel.com/userfiles/files/15975671462.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074791fc7ce9---75617410643.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/dd6cc6017bd49535402035d3c3b13d19/84967090500.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/38821451326.pdfIn PDF document text
    • 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_off0000bf7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7B 16572 bytes
SHA-256: 74cc5caf2d78d13dac43c11251351f22fefa85fb620b87490bed5c7a226bbe3e
font_01_sfnt_off0000eabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D4 11104 bytes
SHA-256: bf8003a3fe2c2c57f8dcbd1f00309a85774a5db350955d59582e6ec4631a7d84

Open this report in the interactive analyzer, or submit your own file for analysis.