Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d64937ec9602c7…

MALICIOUS

PDF

74.5 KB Created: 2021-07-03 05:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e81b19c96228a7c172405f6de1815196 SHA-1: e403cd18f7d8b44d717607cdfbe67d402dbb4034 SHA-256: 12d64937ec9602c76e7a2cd787b96ddc8430108e6c4a3bfc9d5446fd5e91cb7e
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. This behavior is characteristic of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/69e89a9c8b98fbca9e0ef58a88579b1a/1967958084.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c15e40b5c7---7754461464.pdf
    • http://lightningriskassessment.com/ci/userfiles/files/9476053158.pdf
    • https://go2germany.ru/files/file/dumavolum.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/e54e5300060e3a2a64d79bd9e96f2957/xokobulixegininu.pdf
    • http://babyschultz.com/clients/72285/File/polugadonozuderoluxozojun.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1c576d7d2---78333529082.pdf
    • http://pc75.net/upfiles/file/1625212222.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6e75897f5---40600289765.pdf
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/47093934047.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160791cf640b02---lirugibepurezu.pdf
    • https://vigiweb.cl/dinamicos/files/file/10997949887.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/052d664056f5737e5714e58a06e93099/4441479401.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/7sbd6t0u9rqa62rojglqvelh23/84484680067.pdf
    • https://blugarden.eu/file/firenofarevefanovid.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607422671ac0d---84889838981.pdf
    • http://szentimresiklos.hu/upload/file/5803059386.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ebd6adebf---ruset.pdf
    • https://novzelandiya.ru/ckfinder/userfiles/files/32432747805.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210622175009.pdf
    • http://adabaskimerkezi.com/upload/file/91382671193.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/1ef2e2fbc30cb23298ecaa5a31c2df16/7431625051.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/899ce15c6746fe78da2496ff33885486/nibimomizadex.pdf
    • http://katachizu.com/img/news/files/15028814110.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=beckman+coulter+service+manual
    • 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_off0000c0fc.bin
e1a81105a40b2aa517dee3be2f37fd17685da141db354e13871b5ce564613d0c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FC 10700 bytes
font_01_sfnt_off0000d996.bin
4358390c63e4c32056777f1e1ee50635cba79184051a4716d7bcf3560bfe8e94
pdf-font-stream PDF embedded font (sfnt) at offset 0xD996 16716 bytes
font_02_sfnt_off0001049b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 16792 bytes