Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e261d77da38c6b…

MALICIOUS

PDF

79.0 KB Created: 2021-08-11 16:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 47ec4289a03ac2333035b0c6c37c8f24 SHA-1: 57c4183726449ab17de8237bb449bb8c21442107 SHA-256: d1e261d77da38c6b70365df4a1b3073e5e035585455a519f021a2899e3e73980
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple websites, many of which are hosted on compromised WordPress upload directories. This suggests an attempt to lure users to malicious content, likely for phishing or malware delivery. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9268

Heuristics 5

  • 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
  • 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://inbeeldt.nl/userfiles/file/17226978450.pdf In PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/852012ff3a241266161a865afa09c9a4/gemupubezubumabegu.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/ruxofosofusoxapaxiwu.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/81087128106.pdfIn PDF document text
    • https://rinducm1.com/contents//files/20988288656.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/fomolobajuvemixozij.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/571be026732dc2867e38b32cb1c308d1/92022243719.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/vituzi.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/54n4h10mdb69i0nie94uhitv6u/75879005439.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/sidowugipujanelubifeled.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bdb329568---lefegogok.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/rubojivivelufut.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/tuvelazafifebar.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/besedevutekopitotisalab.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d338c90f1---mabutixexedolafen.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/4626964544.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611189d6ea4a3---xexapovelexavizegujulijeg.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/280aojf9jhmua7q8kv1pgrp8fl/28124894612.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/a149716527ff8a5a2981928ec9d3ee01/tamononezijoxana.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/73634666278.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+play+trumpet+notesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001170a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170A 10612 bytes
SHA-256: c7c74d51481f251ea4365f49ef03aae3034379bad38e1d61119e049b8e1fe83a

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