Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0c1dc624a1b374…

MALICIOUS

PDF

86.8 KB Created: 2021-03-19 14:33:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3bcdc3c09364446025c2bc0a9de4048a SHA-1: 9d391fb8f85b48fb038331aab6501cc419183d4a SHA-256: 0a0c1dc624a1b374af56c336181fb807c123e1aebdbf5b1ae9b52a60710c2111
126 Risk Score

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 0.9995

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://leonvi.ru/strik?utm_term=how+to+walk+through+walls+in+pokemon+red PDF link annotation
    • https://nikirepe.weebly.com/uploads/1/3/4/7/134743809/2622338.pdfIn PDF document text
    • https://xuwizaku.weebly.com/uploads/1/3/1/6/131606213/8585815.pdfIn PDF document text
    • http://xipodijajul.sportsontheweb.net/discovery_of_witches_season_2_episode_3_air_date.pdfIn PDF document text
    • http://farvestnn.ru/las_medias_de_los_flamencos_cuentor9zfo.pdfIn PDF document text
    • https://ramexolilaburav.weebly.com/uploads/1/3/4/3/134331107/mejuxivi_rodutalos.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/95881521562lngjj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_6041ef5d2f95d.pdfIn PDF document text
    • https://gupovokezatiku.weebly.com/uploads/1/3/4/8/134878629/450850.pdfIn PDF document text
    • https://siroxaje.weebly.com/uploads/1/3/4/0/134000026/magesavuzedujibuz.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/mbidTrr/45793642052.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/how_do_i_know_if_my_cpap_humidifier_is_working.pdfIn PDF document text
    • http://topchambre.xyz/nitolazizegenebasegovz6yqv.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/H4hfgiM/democracy_company_meaning_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/cjghbLy/choice_of_magics_romance.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/fhrwjh0/rexepolimawebaromex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_6023f52d3858b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459034/normal_6019cb35716ee.pdfIn PDF document text
    • http://sale20.site/waserojopozejigulanotamix8tzz9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_6039cd1a0638d.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/gomotigib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xezaretidatoro.onlinewebshop.net/pomomobukokebolum.pdfIn PDF document text
    • http://juborekif.atwebpages.com/mathematics_book_for_gate.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001071d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071D 5372 bytes
SHA-256: a60b31e64965ac50586e8ce1beb34a688e5697cf2f61c4550d4fa707c7574128
font_01_sfnt_off00011940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11940 10740 bytes
SHA-256: a52e2d01a234591b0e989189dde8bb1e50f15258bfd5247f29dc742375e290c1
font_02_sfnt_off00013dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378