Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60e58f08ad84b8e…

MALICIOUS

PDF

72.8 KB Created: 2021-02-14 21:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2be6f41b83fd33756094b6eb0fd04062 SHA-1: 95167bb5ebe61dc2db2fe114b030911b5325fb36 SHA-256: c60e58f08ad84b8efa06976dc7fb9eab49ace799d1732b97a3797af0559a2222
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm PDF. It contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or dynamic DNS services, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user engagement with these lures.

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://seumenha.ru/123?utm_term=egyptian+hieroglyphs+for+complete+beginners+pdf PDF link annotation
    • https://cdn.sqhk.co/redusebi/LJhixjh/best_ever_racing_driver.pdfIn PDF document text
    • http://zahlungsservice-ch.site/gastric_cancer_diagnosis_guidelinesvhmsh.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/c323aacf9.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/lK3jdig/rush_roll_the_bones_t_shirt.pdfIn PDF document text
    • https://nosozekime.weebly.com/uploads/1/3/4/6/134634018/lukomaruz-rivixu-patamezaviro-bedowobonon.pdfIn PDF document text
    • http://muslims.net/poe_elementalist_build_3._12jiigx.pdfIn PDF document text
    • https://cdn.sqhk.co/xizubutagen/Thgekic/printable_fall_happy_birthday_banner.pdfIn PDF document text
    • https://tunegize.weebly.com/uploads/1/3/4/5/134500295/jalumagojozaremu.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/ggcnqjc/79836522577.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/pevatovalafazuzoj.pdfIn PDF document text
    • http://ttop-shop.com/channel_4_news_detroit_reporterssd46o.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/dazemi/bug_bounty_hunting_methodology_v2.pdfIn PDF document text
    • http://tevisub.rf.gd/incremental_sheet_forming_ppt.pdfIn PDF document text
    • http://jixadatisaxifid.rf.gd/knights_of_cydonia_drum_sheet.pdfIn PDF document text
    • http://rixuzomobe.epizy.com/6228879193.pdfIn PDF document text
    • http://zuwogupewukefet.epizy.com/96040856552.pdfIn PDF document text
    • http://fazetotunoju.epizy.com/81040563624.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2B 5768 bytes
SHA-256: 64e56be888964d0ba191f0afd9c1c9631d8d3326f350ab266ce1869fed30e942
font_01_sfnt_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 10412 bytes
SHA-256: 08cdb977b7178afec48e4c20e8d67e90417efb4311d62b9896d6fdf647c9cc8d

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