Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8abe067da501acd…

MALICIOUS

PDF

129.4 KB Created: 2021-03-27 09:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d59625ffe8f8e5e2cb5f824f65675f61 SHA-1: 5b34e4da61d93a26b2bccafabb21f97d14b894d7 SHA-256: b8abe067da501acd9da16805e87c3fe768c143bbcfacd56fd8f466658dc51898
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 0.9999

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://maypoin.ru/123?utm_term=talambuhay+ni+andres+bonifacio+pdf PDF link annotation
    • http://tajavimisafom.22web.org/software_quality_assurance_plan.pdfIn PDF document text
    • https://subuletow.weebly.com/uploads/1/3/4/2/134265429/3319c6352bb4c.pdfIn PDF document text
    • http://starkrobotics.org/what_time_is_best_to_trade_cryptocurrencych0ax.pdfIn PDF document text
    • http://temppicture.xyz/donamuxajumojopolegexatmsow.pdfIn PDF document text
    • http://bitjoms.xyz/can_you_still_play_gta_iv_onlineph82q.pdfIn PDF document text
    • http://razejeperijifop.22web.org/expanding_single_brackets_algebra_worksheet.pdfIn PDF document text
    • http://keepxufi.space/bounty_hunter_2016_movie_freedt4cf.pdfIn PDF document text
    • http://ayazshabutdinov.club/452579052101wt1o.pdfIn PDF document text
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/6001928.pdfIn PDF document text
    • http://pagebake.com/is_the_woman_in_cabin_10_on_netflixjt3j4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kumugirenukelil.epizy.com/how_do_you_fix_a_sewing_machine_problem.pdfIn PDF document text
    • http://betizig.epizy.com/83755087241.pdfIn PDF document text
    • http://famirafopuremu.rf.gd/76695250408.pdfIn PDF document text
    • http://botemura.rf.gd/pamota.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/bokolufixuxa.pdfIn PDF document text
    • http://rereroma.epizy.com/68302674606.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/why_does_my_orbi_keep_blinking_white.pdfIn PDF document text
    • http://dovabaz.epizy.com/34759618937.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/gijosagu.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_off0001bb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB69 5588 bytes
SHA-256: c6231107208bd1b2a95e08ad76256292c7ddfe219ae9f942a76879b4ae1a8875
font_01_sfnt_off0001ce3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE3F 13060 bytes
SHA-256: 04c1d00db83673f441b832d90279dfd5d20f72818ccdb5fcc7da3076baeb265d