Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a49d74c17888dc1…

MALICIOUS

PDF

86.9 KB Created: 2021-06-30 23:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 219a900d424b2da34ef17fb8cd5746a9 SHA-1: d23963fa6c1d0edf0494719a5bdb809de7be00cf SHA-256: 1a49d74c17888dc1215d8819aa3893dffdac737bdfe36e5a15d7a66de6c1743c
156 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress installations or disposable hosting, suggesting a phishing or scam campaign. The presence of a 'utm_term' parameter in one URL indicates tracking for user engagement, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://catamma.ru/uplcv?utm_term=pixie+thick+wavy+hair PDF link annotation
    • http://phunggia.biz/userfiles/file/95755686078.pdfIn PDF document text
    • http://orhs76reunion.com/clients/30721/File/85901111682.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c1183a953---lejomukobot.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/c147473791399045d2defe83b43073cc/wigipup.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210517140237.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/on25iev5foft6l2l4pboloe6q3/14502187426.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/56794423048.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/92015021121.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/25531199206.pdfIn PDF document text
    • http://heizler.hu/files/file/lamugofomimexolafi.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/fa5bddfcd161b0b85408ce23cd70b8d7/86727516267.pdfIn PDF document text
    • http://navigator-33.ru/media/file/fujimulipes.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/f22954d2644f4716bb6f1b03cd3009f9/rodibo.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/9b26a21015ba8cfb304e9d5e87361d19/6433858761.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3322245a0e---69777841414.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/obbbrae24p7t3nav45tbob78mg/pagutite.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/numogutekegagugu.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a72cb43e977---revavevigabe.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/23377324096.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/c90694529602ba4ced6ec04947fdd21b/putopobiwadolorumik.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/91158064434.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/vtb4bmje527maf54893a6las92/58444534018.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/20391979241.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 10348 bytes
SHA-256: e2ab60a921fbddc8b3b20e5f245a290e4cae449170824605bc27327afbf676a0
font_01_sfnt_off000108ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108ED 17384 bytes
SHA-256: 6b0c45ada8729ab08a10e8f7aa7474e381263602c16f5cac66cf734d03b65286
font_02_sfnt_off000136a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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