Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfa5491fc79634c…

MALICIOUS

PDF

72.1 KB Created: 2021-01-17 16:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ca2cda65ca24535259bf2dba6e9ad8a6 SHA-1: 1a3d3ea07a7c80755bcb0379857a6da57eebfa03 SHA-256: 9dfa5491fc79634cbdab7df216509dd97b15085f35f8bfcdf92efbcdfaf736c4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://trafficel.ru/wb?keyword=espn%20nfl%20stats%20team PDF link annotation
    • http://pumujavebedopa.iblogger.org/17753606982.pdfIn PDF document text
    • http://maroron.22web.org/devilsaur_farming_guide.pdfIn PDF document text
    • https://motefeka.weebly.com/uploads/1/3/4/1/134108707/xuzitok.pdfIn PDF document text
    • https://lufosafol.weebly.com/uploads/1/3/0/7/130775677/jifevem.pdfIn PDF document text
    • https://zegaturivelegob.weebly.com/uploads/1/3/1/4/131437779/f571adeab9c568a.pdfIn PDF document text
    • https://cdn.sqhk.co/muvasesuru/djbMgf9/ding_tea_menu_la_quinta.pdfIn PDF document text
    • https://zanagolebiwom.weebly.com/uploads/1/3/4/9/134900312/bemevomemefaj.pdfIn PDF document text
    • https://cdn.sqhk.co/xejulonejo/Phj8kjk/robot_warfare_apk_mod.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/luraxenekopetofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_5f8f4c4d5afb3.pdfIn PDF document text
    • http://kadabafomelu.66ghz.com/2002160835.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://bojibag.epizy.com/jopumivekimodulekova.pdfIn PDF document text
    • http://bizebiza.rf.gd/77275396759.pdfIn PDF document text
    • http://lulanikigog.epizy.com/he_doesn_t_answer_my_questions_directly.pdfIn PDF document text
    • http://junedujivoxoz.epizy.com/vezuwiroliramosozamika.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_off0000d1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CF 4540 bytes
SHA-256: b70d3efd99d9bf441e7de32dc7d41f773d85f6627a172aac638c91be36bb7ea1
font_01_sfnt_off0000e113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 10740 bytes
SHA-256: d99a2ac4d1dcf2ff846603a406ed3e6be3d4f422f5e32ffce7ee704c84c9680d
font_02_sfnt_off0001059d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059D 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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