Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab642b8d89da512…

MALICIOUS

PDF

66.4 KB Created: 2021-03-31 21:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ba6f83e288a5b4cbe99021480b49272f SHA-1: 4ef5542c4fb7a90286bdbfa531822c3dfcf1e54d SHA-256: dab642b8d89da512184d448154ca62e9c93ae3d4219d358706ccab142b349d1d
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with a high probability of being malicious. The document body is heavily obfuscated, but the presence of numerous links and the ClamAV detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=basilea+1+y+2+pdf In PDF document text
    • https://nipawivas.weebly.com/uploads/1/3/2/6/132680981/968829.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/how_to_replace_batteries_in_xfinity_remote_control.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/bgeKhjE/smoke_editor_steam_effects_photo_studio_near_me.pdfIn PDF document text
    • http://tk-pobeda.site/58601444080ot401.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/hiqHvhe/puzzle_100_level_30.pdfIn PDF document text
    • http://grinallex.shop/sample_acknowledgement_for_project_reportyxk0z.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/udighaC/58965554842.pdfIn PDF document text
    • https://jatuvukaxakepu.weebly.com/uploads/1/3/4/3/134313635/9c102f.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/T4vGAFe/81236664611.pdfIn PDF document text
    • https://vekukedabil.weebly.com/uploads/1/3/4/7/134710008/2253646.pdfIn PDF document text
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/bilobeletane-rovase-dolibone.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/kobalt_10_inch_dual_bevel_sliding_miter_saw_review.pdfIn PDF document text
    • http://foyou.store/how_to_pair_pioneer_mixtraxl8h9k.pdfIn PDF document text
    • https://vuvunovugigadi.weebly.com/uploads/1/3/0/8/130814714/wuxir-razokopidipozo-fozerubej-fuvufamubajed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vunibem.epizy.com/cheekh_episode_13.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/1298788132.pdfIn PDF document text
    • http://fadajoja.epizy.com/nixotegulomamurim.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/zagapewu.pdfIn PDF document text
    • http://wisiver.rf.gd/bohemian_rhapsody_partitura_piano_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/adobe_reader_viewer_for_pc.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/39372788964.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/sadedaxex.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/94147602748.pdfIn PDF document text
    • http://tewapodu.rf.gd/36109905115.pdfIn PDF document text
    • http://xonolori.atwebpages.com/9303568780.pdfIn PDF document text
    • http://zalowakudedakov.rf.gd/muviwexu.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_off0000c9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EE 5272 bytes
SHA-256: 5bf99d410efbc17490a63def3718aba19257beeb2973e19deda49015e31d29fd
font_01_sfnt_off0000dc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC07 9044 bytes
SHA-256: a5d2a69f98fef1d2601a7ac9a13a4f79fc9aee358c62e598f6930b98e7a0d1b5