Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec9e0944f764abf…

MALICIOUS

PDF

77.7 KB Created: 2021-02-15 07:19:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4b2aa9f8255286e616ce0486fbad6480 SHA-1: 28cb06880a7c3f8f5fb5d4657409673a9f3ebcbf SHA-256: 1ec9e0944f764abfce48ad758e356877f06463eb824c39329a07522edbda77b5
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'ascendancy pc game manual' and 'wkhtmltopdf', likely serving as a lure to direct users to malicious sites.

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://leonvi.ru/aws?utm_term=ascendancy+pc+game+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420459/normal_5ff1bd300d6e5.pdfIn PDF document text
    • http://help-nanny.site/alfie_kohn_theory7kvo2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_60126368c8356.pdfIn PDF document text
    • http://whysmall.space/japanese_american_porns7wpm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470543/normal_5fd3a3ba5899b.pdfIn PDF document text
    • https://kutakikojog.weebly.com/uploads/1/3/4/6/134688668/tifunekevawose-joxit.pdfIn PDF document text
    • http://theboldpantsproject.com/dewagibugopukesotexifunelhncal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_5fe814566619f.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/rekorewexidiwo/treble_clef_staff_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/50116826775.pdfIn PDF document text
    • http://kugibujupedo.rf.gd/fikexuwizomorapu.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/kixavef.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/xikuripe.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/c_2d_array_template_class.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/32171116108.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_off0000f2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B1 5388 bytes
SHA-256: 603c1cfd7e7545ddf2000015ca0ba8d435690a7d4e4fcc37533340d038743c7b
font_01_sfnt_off00010509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10509 10816 bytes
SHA-256: 3f671000c0f6f4c390ec23948edfe82dd96a6608cfcbe7228022eef3b60d3659

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