Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aedf1f7b34f6aab…

MALICIOUS

PDF

77.2 KB Created: 2021-02-28 00:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7028fd62687d79cfa3c2f306858786b7 SHA-1: d959509b47a37a5b20683e780010cc6d966b017c SHA-256: 8aedf1f7b34f6aab9ad885f9b2f84b414f852b01bba9ac06a0c2fa4381be4a1d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to design applications, directing users to potentially malicious sites. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jumiwimov.ru/123?utm_term=what+is+the+best+design+app+for+ipad PDF link annotation
    • http://tafugegajotu.mygamesonline.org/bolidovegojamawof.pdfIn PDF document text
    • http://zazubabifuwor.iblogger.org/hamlet_soliloquy_act_2_scene_2.pdfIn PDF document text
    • http://hydra.moscow/toxuvivumpi5tm.pdfIn PDF document text
    • https://xizuxikeg.weebly.com/uploads/1/3/0/7/130740292/9690642.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/rumble_fish_book.pdfIn PDF document text
    • http://gurotazejo.22web.org/how_to_clean_honeywell_warm_mist_humidifier.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/pete_the_cat_thanksgiving_book_read_aloud.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/blood_bowl_2_starting_chaos_teamn06mn.pdfIn PDF document text
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/muxitazugulowux-jixadakumik-sobolujisajaken.pdfIn PDF document text
    • http://cookwellbakewell.com/libros_de_calculo_vectorial_recomendadosuilo7.pdfIn PDF document text
    • http://lnstagram-helping.live/anesthesiologists_manual_of_surgical_procedures_downloadsdt1g.pdfIn PDF document text
    • http://senenetikoxikom.22web.org/83125217603.pdfIn PDF document text
    • http://soguged.22web.org/bopivezolupowenanonegasu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sujemepis.epizy.com/metuxojazij.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/84342267272.pdfIn PDF document text
    • http://jimomug.rf.gd/bitcoin_miner_app.pdfIn PDF document text
    • http://zuputes.atwebpages.com/skyjack_3219_for_sale.pdfIn PDF document text
    • http://mezifaxura.rf.gd/92091171047.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_off0000f07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07B 5424 bytes
SHA-256: 3f0333605da960292779dd0084b744fb11dc6cd30c7912081dd4ba8fc1fe42bf
font_01_sfnt_off000102f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 10768 bytes
SHA-256: 22abbf632f6ad8df95756ac4b6669706389aa8008b3b9e2331c4ffafcbb16073

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