Malicious PDF — malware analysis report

Static analysis result for SHA-256 491ccfc862476372…

MALICIOUS

PDF

93.2 KB Created: 2021-01-29 03:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3932c035b57ce8d8a5091ed70d57ec20 SHA-1: 9904ba4df4d510ec657e1e913b470a7c8fd3bdc8 SHA-256: 491ccfc862476372e430d292bbe4f6bcceb7b0a67fb85b0ef15baf32761dab08
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution attempt. The presence of 'utm_term' parameters in some URLs indicates tracking or redirection mechanisms commonly used in malicious campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/123?utm_term=japanese+word+for+strong+warrior PDF link annotation
    • http://mnogolidov.xyz/oscar_pistorius_net_worth_nowgx1hl.pdfIn PDF document text
    • http://legalvictory.group/54424771479sgeum.pdfIn PDF document text
    • http://wspring.space/korenajutaki2awna.pdfIn PDF document text
    • https://cdn.sqhk.co/bebiwamulanu/OgixPie/52387060467.pdfIn PDF document text
    • http://repair-monokoles.ru/38053353735lwgq8.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/egiuhee/ragdoll_warriors_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxifopu/jdgduYz/cut_off_at_the_pass_crossword.pdfIn PDF document text
    • https://cdn.sqhk.co/jatizaru/giZifZJ/electric_guitar_brands_beginning_with_s.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/gdD9Om9/carmageddon_ii_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/idyhjja/jugar_standoff_multiplayer_en_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/libarazituw/djbPhgP/ledev.pdfIn PDF document text
    • http://formverifiedbadge.com/american_big_picture_a1hhv06.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/jdhgBhi/dibidedemoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimozan.epizy.com/39643160386.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/nojiberidupofibum.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD710 21524 bytes
SHA-256: 10fd565ef8813519e020cae8325eed97769c3025a6c61644018a023468dcfd05
font_01_sfnt_off00011aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA7 5260 bytes
SHA-256: d08cdae8c6fe153d22c9b6c381665bcbcc5d3cd4af20e70248b049ddcc9e0f01
font_02_sfnt_off00012cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAD 11084 bytes
SHA-256: 934a074ff30f125c35978b1da3b8351526bb63c2600cbbdf48cfae3bbfc64620
font_03_sfnt_off00015213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15213 16076 bytes
SHA-256: 1572f1bef06e94643c552f70f3ef07ecee9bf7de88dacbdbabe2fa1db5c51cc3

Open this report in the interactive analyzer, or submit your own file for analysis.