Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a159b0e863aa04…

MALICIOUS

PDF

75.2 KB Created: 2021-02-27 22:23:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 091fb07ca1db235315b6575f70d4a236 SHA-1: 55d9643e8fab80887ed24477604f3c389f3c34e9 SHA-256: 08a159b0e863aa046f6d2da48967a943a8d275b634910639848c3eed3ec2a745
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, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a link farm designed to obscure malicious destinations.

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://ponafet.ru/aws?utm_term=why+won%2527t+my+garmin+update PDF link annotation
    • http://bamovewube.22web.org/wisezilusiwibivokuxe.pdfIn PDF document text
    • http://zvezdasevera.online/22200336373nns8z.pdfIn PDF document text
    • http://jujibej.iblogger.org/xafudavejeweruzimisewe.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/75517035939.pdfIn PDF document text
    • http://teachersaid.fun/cyberpunk_2077_gameplay_1_hour8ae4o.pdfIn PDF document text
    • http://mebets.xyz/85498404548xki9e.pdfIn PDF document text
    • http://reactivascotia2020.com/book_review_format_isc4ad5k.pdfIn PDF document text
    • https://xotubowewetiner.weebly.com/uploads/1/3/2/6/132696149/cf2daecbd.pdfIn PDF document text
    • https://wewiloviwa.weebly.com/uploads/1/3/4/5/134585183/bad73.pdfIn PDF document text
    • http://hopecommunitynaz.com/what_does_the_word_black_ice_mean8x98m.pdfIn PDF document text
    • http://drilltech.info/linear_regression_in_r_step_by_stepn6jng.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mawigugu.rf.gd/google_chrome_mod_terbaru_apk.pdfIn PDF document text
    • http://susegemosesipul.epizy.com/40412855277.pdfIn PDF document text
    • http://vobununebufipu.rf.gd/chinese_relaxing_instrumental_music.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_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 5404 bytes
SHA-256: bfdf2313e4c4a827a1d38e45a0d3e986e1eccbc217e29176587107f7cd099009
font_01_sfnt_off0000fbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEF 10572 bytes
SHA-256: 5658d798155f1032e732b7b35dab67f73f35ace69f14a540d5e95bb4e443358b

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