Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bd7f949cebd6bc…

MALICIOUS

PDF

73.2 KB Created: 2021-01-31 12:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9ee0ce928b15704655fe6e97b0234079 SHA-1: 21b32f8a186d1ada9af563aed468ea8a19a250a8 SHA-256: 64bd7f949cebd6bc21dbd06a494132d7ee328c4243c74e8f2aa4dbfcd811bb10
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, including one that appears to be a search query for 'jw library for osx' on a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and unreadable, but the presence of numerous external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wb?keyword=jw%20library%20for%20osx PDF link annotation
    • http://8bitbeardsco.com/97547538296sq7h0.pdfIn PDF document text
    • http://podeves.xyz/lizedefopomuly480.pdfIn PDF document text
    • http://tolizidusinakil.22web.org/crayfish_care_sheet.pdfIn PDF document text
    • http://teplotronic.ru/recharge_mobicarte_orange_ne_fonctionne_paswhssz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474211/normal_5ffd24db1998b.pdfIn PDF document text
    • https://dijuwinepogiw.weebly.com/uploads/1/3/0/7/130738679/5592242.pdfIn PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/wopot.pdfIn PDF document text
    • http://picsonair.com/oceanborn_survival_on_raft5689f.pdfIn PDF document text
    • https://worojipe.weebly.com/uploads/1/3/1/3/131382243/warip_dasobelajavu_bigaxenetag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwejozaz.epizy.com/lateral_thinking_riddles_with_answers.pdfIn PDF document text
    • http://lilufunom.epizy.com/technology_powerpoint_templates_2019.pdfIn PDF document text
    • http://judixipe.epizy.com/scientific_calculator_casio_apkpure.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_off0000e1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CE 5152 bytes
SHA-256: 76f4f22a92968ccc4c74e616dad0fa8b4fc58e2f19c20c561264519e29d29ecd
font_01_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 10976 bytes
SHA-256: 5f6049ffc105332cc54d3d73ec3e176f24162b6bafc09a85664bb8fa3745478c

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