Malicious PDF — malware analysis report

Static analysis result for SHA-256 2187524893817f13…

MALICIOUS

PDF

80.2 KB Created: 2021-03-10 01:15:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d6d764dbdd40593e1ffede30c2762f4d SHA-1: 3393bf502608465eb3fa119e03d717220d1d80e2 SHA-256: 2187524893817f130ee8719db7b7f317062609eb146e2888ff704fca89e4d5a3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://druttle.ru/strik?utm_term=baudrillard+simulacra+sparknotes PDF link annotation
    • http://mibemuxagegija.mywebcommunity.org/49047008690.pdfIn PDF document text
    • http://cashfree.store/munich_2005_full_moviegjxbn.pdfIn PDF document text
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/filiruwekedarevof.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/cxqjihd/91003527585.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/bhdjc8y/34949171899.pdfIn PDF document text
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/tefejeluvadumixi.pdfIn PDF document text
    • https://zowemuxojawoput.weebly.com/uploads/1/3/4/3/134357794/6047477.pdfIn PDF document text
    • http://1xbet-registr.site/para_que_sirve_el_entero_guanilmb0d7.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/hjfnYaP/play_worm_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/bggrgiA/7557864994.pdfIn PDF document text
    • http://begdas.fun/43878455842z6qsx.pdfIn PDF document text
    • http://hookup154.fun/fender_hot_rod_deluxe_iv_40_watt_electric_guitar_amplifiertf23e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/738b922f-c743-48fd-a19e-1b5bcd9c8328/what_is_the_3rd_book_in_the_selection_series.pdfIn PDF document text
    • http://zaxukesaludu.epizy.com/56673385958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b8b9c2-a482-4bf1-9f92-716bb5e1d02f/sound_blaster_ae-9_zxr.pdfIn PDF document text
    • http://rujugojokukasav.rf.gd/rekilibevejuxunutatuwiret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a6666f-3fdf-4c69-b322-f9b85e3a1133/radical_mycology_book.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/94104716768.pdfIn PDF document text
    • http://vezavajizuvos.epizy.com/98847922758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9daebad5-f393-4298-876d-a89373dd6fd1/perfect_english_grammar_phrasal_verbs_4.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_off0000fd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD38 5332 bytes
SHA-256: eef3681305b9e4e1f73820177b7b5d125c685df5e423bf5983f20450bd497455
font_01_sfnt_off00010f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F44 10580 bytes
SHA-256: 35bac4411d25c6bb5d00058dac7bf1e6f9b221314eaa65833c7050e02629687f

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