Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30aac1b4a17d5a3…

MALICIOUS

PDF

74.1 KB Created: 2021-02-16 19:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bd8700f55e7f67225486bc8b1f64c244 SHA-1: 1006009706eaebea1cc396f3f1ccd5f73f2e97cb SHA-256: f30aac1b4a17d5a3312db55fe7e2d552c933e12137a9864c99c77ee61cb799ef
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains references to 'Baldur's Gate 2 enhanced edition cheat engine' and 'wkhtmltopdf', indicating a potential lure for users seeking game-related content, likely to redirect them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=baldur%2527s+gate+2+enhanced+edition+cheat+engine PDF link annotation
    • https://xonajababivoxo.weebly.com/uploads/1/3/4/0/134040492/c3bc83.pdfIn PDF document text
    • https://jepemanek.weebly.com/uploads/1/3/4/5/134589705/jolawunabel.pdfIn PDF document text
    • http://trokot-roznica.xyz/keto_dessert_recipes_dairy_free21z2r.pdfIn PDF document text
    • https://tibomomaludo.weebly.com/uploads/1/3/0/9/130969572/6139307.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/f5a9e9366323a72.pdfIn PDF document text
    • http://gazorowegesejix.22web.org/zeletufutogafijenef.pdfIn PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/eef789e89ecc.pdfIn PDF document text
    • http://melodabogaso.66ghz.com/online_video_link_generator.pdfIn PDF document text
    • http://itfamily.pro/best_life_simulation_games_ios_2019gggld.pdfIn PDF document text
    • http://kungfumalibu.com/9815392809030sr4.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/8990bf31fa.pdfIn PDF document text
    • http://gouliwer.online/85890648890s62fk.pdfIn PDF document text
    • https://xowavexinoj.weebly.com/uploads/1/3/1/4/131408618/lolisajalapuvur-wanonenol-mixakijeguzaju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kidajovude.epizy.com/is_p90x3_still_good.pdfIn PDF document text
    • http://zalaxorenisev.epizy.com/jazomasat.pdfIn PDF document text
    • http://wagimaparojova.epizy.com/xewanuviwipupopuralibape.pdfIn PDF document text
    • http://koxogulu.rf.gd/jineruxi.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_off0000e325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE325 5416 bytes
SHA-256: 706745c733d50c4938ef9a1682ef95c8336854ca2217f0ef43381e7681538495
font_01_sfnt_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 11016 bytes
SHA-256: 625949f320192058ec7078731d4b79824877aeaf156271016b1f101984810a0a

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