Malicious PDF — malware analysis report

Static analysis result for SHA-256 a35184d1e13ea2a4…

MALICIOUS

PDF

61.3 KB Created: 2021-03-06 06:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 77e2b871991538825091152db70d1454 SHA-1: d557679c2c81d5dcb705005c3caa2f8a3d48970a SHA-256: a35184d1e13ea2a412ed1ad5b8b975fa7252588b7c198665a1252db6801013e1
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=how+do+i+turn+on+telstra+call+forwarding In PDF document text
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/goten.pdfIn PDF document text
    • http://dfwshootersupply.com/gefufinasimigozosofqhhjb.pdfIn PDF document text
    • http://roguvopupo.22web.org/lamofo.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/wildgame_innovations_camera_repair.pdfIn PDF document text
    • https://gojojiwegojefuw.weebly.com/uploads/1/3/2/6/132695574/2176291.pdfIn PDF document text
    • http://formulamoney.top/82918932511hjgy8.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/tazapugamak.pdfIn PDF document text
    • https://govoxarenaja.weebly.com/uploads/1/3/4/8/134874143/22c15d810d0.pdfIn PDF document text
    • https://balevowoperat.weebly.com/uploads/1/3/1/3/131397989/venog_silugojozemi_vuvonikol_vosirolenufof.pdfIn PDF document text
    • http://ropakega.22web.org/zavezomira.pdfIn PDF document text
    • https://vuguwawu.weebly.com/uploads/1/3/0/7/130776175/bipexavixenutomo.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/2820102.pdfIn PDF document text
    • https://gunomelovolif.weebly.com/uploads/1/3/4/7/134735852/wuzabo.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/15958496043mn30s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/comparative_advantage_examples_with_answers.pdfIn PDF document text
    • http://zuwosopawekaz.rf.gd/line_graph_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/3147761957.pdfIn PDF document text
    • http://sulifuzefusuw.rf.gd/dibofaxiguzuwepitiradivix.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/mafiba.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE498 5240 bytes
SHA-256: 5a6becc7ce907bf83dfc6183f2dd5b08d984cd0b2dbaca6a96f4289922f85110

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