Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d4ec4e309885e2…

MALICIOUS

PDF

88.9 KB Created: 2021-03-21 11:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 40f09750c40ba60a08e0edd10b6fe416 SHA-1: c91e4081ebe0d2115c53bd712fc7f87aedd87f1d SHA-256: 67d4ec4e309885e21bef524a221a3404b8a6f557fb4fcf12119505375d8498cc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, with heuristics identifying it as a link farm hosted on disposable domains. The primary URL, https://ponafet.ru/wix?keyword=satele+shan+son, suggests a potential phishing or malware distribution lure. No scripts were extracted, but the PDF structure itself is used to facilitate the redirection to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/wix?keyword=satele+shan+son PDF link annotation
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/756f70.pdfIn PDF document text
    • https://tejojapifofomo.weebly.com/uploads/1/3/4/3/134339563/kekajabomutuv_walikutixaril.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/jumperoo_fisher_price_rainforest.pdfIn PDF document text
    • https://jekowidemovo.weebly.com/uploads/1/3/4/7/134702183/xakifolewabowiv.pdfIn PDF document text
    • http://lnstagramverifycentre.com/nigavofisikodivonam384u2.pdfIn PDF document text
    • http://justamorem.com/929526135704t9pb.pdfIn PDF document text
    • http://svarka-aurora.online/web_service_rest_api_node.jspwlj6.pdfIn PDF document text
    • http://classicalnaturally.com/53668914354k0b8p.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/jopibanokufojavubi.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/tuvax.pdfIn PDF document text
    • http://ourfutures.space/beanie_baby_value_guide_onlineeht8j.pdfIn PDF document text
    • http://biggymstoe.com/best_kit_to_learn_calligraphyi6i16.pdfIn PDF document text
    • https://lugonejiborin.weebly.com/uploads/1/3/5/3/135336075/vuledonelosumowo.pdfIn PDF document text
    • https://gavuzamamezi.weebly.com/uploads/1/3/4/5/134590232/6313445.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/bagolezefafuro.pdfIn PDF document text
    • http://interbank.link/what_is_free_flow_journaling25wvx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://satogitexuvo.myartsonline.com/assessment_for_learning_putting_it_into_practice.pdfIn PDF document text
    • http://tofujuwo.onlinewebshop.net/peningkatan_kualitas_sumber_daya_manusia.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/advantages_of_geothermal_power_plant.pdfIn PDF document text
    • http://jarepumemaxi.onlinewebshop.net/java_jdk_7_kompletan_prirunik_download.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001135f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135F 4520 bytes
SHA-256: aba08fe7bc9946eebb9f3742d5081b45b45e9eca8f5a92551acc66234d34d8ee
font_01_sfnt_off0001229d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229D 10996 bytes
SHA-256: f9a4febda963c9118ba9a433c144d1c553f78341ebe3dd93b95dcaac9a4a465c
font_02_sfnt_off0001481d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1481D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34