Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ab1c54d1e7f100…

MALICIOUS

PDF

81.1 KB Created: 2021-03-30 04:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 41feef4187974d426e7b6a870d14d965 SHA-1: 1ea8d20d5fc7b00f529304058df7a368ee0446fa SHA-256: c8ab1c54d1e7f100131c3f46598b401d3f91d5a4eacad3d1798b0ecb5d0a59c4
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 0.9993

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://xajibur.ru/123?utm_term=asmedia+106x+sata+controller PDF link annotation
    • http://ilook.market/11628156670pf2s.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/rifghks/goal_goldratt_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426820/normal_5fe347247b3ff.pdfIn PDF document text
    • http://pojebanidik.mywebcommunity.org/jokamawonekum.pdfIn PDF document text
    • https://cdn.sqhk.co/mokabawimav/gdKc2hj/movie_maker_free_no_watermark.pdfIn PDF document text
    • https://cdn.sqhk.co/rupizabiweze/hbJ3kif/texevowe.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/hgxiqC3/19420507339.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/Qnaicjh/rome_total_war_barbarian_invasion_cheats_pc.pdfIn PDF document text
    • http://igoscandinavia.com/boss_micro_br_manual_espaolxy5oo.pdfIn PDF document text
    • http://kizuberuzusa.iblogger.org/ordering_your_private_world_quotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_5fda4eefc2e18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_60292936e645c.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/hJhjVBR/77655344683.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/Khbjbjj/fashion_story_cheats_for_money.pdfIn PDF document text
    • http://pasagotijaweti.iblogger.org/nowamurujewaserujimepi.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/char_broil_oil_less_fryer_turkey_time.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/phgTmOe/kimiwebim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455658/normal_600eb16fd8f8c.pdfIn PDF document text
    • http://zujadise.scienceontheweb.net/how_to_change_language_on_sandisk_clip_sport_mp3_player.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381752/normal_600016bb67319.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejegaba.atwebpages.com/whirlpool_cabrio_dryer_manual.pdfIn PDF document text
    • http://zifasodokid.epizy.com/72370429182.pdfIn PDF document text
    • http://piranirisajape.rf.gd/96364673523.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_off0000fb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB53 5488 bytes
SHA-256: 2a0c0ed6164b8069c775c2e988fe9e15ae37b8ca1249a1831df99c487ddec2f3
font_01_sfnt_off00010de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 12196 bytes
SHA-256: f40433540e33fca509e6ad6d61c788b86a2a9b89c46ad83002f1e3bcfe7584ab

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