Malicious PDF — malware analysis report

Static analysis result for SHA-256 66438f930561762d…

MALICIOUS

PDF

67.3 KB Created: 2021-03-10 21:31:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9890d8c2f76f6711105daae2b397535f SHA-1: 5e4ea6811de47cf29e1f75a2e257a5cc8da2bb6a SHA-256: 66438f930561762d7ef6526698587fd067c7b540817b34b796c68e71f417f5b1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/123?utm_term=linga+bhairavi+mantra+pdf PDF link annotation
    • https://rexanofodifedow.weebly.com/uploads/1/3/1/3/131378899/vokekifivodutuv.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/qQibwjb/medezirereg.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/coherjh/hotlink_definition_computer.pdfIn PDF document text
    • http://kushtanash.ru/stars_coming_out_of_box_tiktok0hikl.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/hBuigja/gerozur.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/a39Begj/93445008376.pdfIn PDF document text
    • https://kezofufilulo.weebly.com/uploads/1/3/4/4/134488682/mavejigefopidiwej.pdfIn PDF document text
    • http://comforfemj.fun/are_disney_world_doing_free_dining_in_2021h472k.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/agjOje4/sazawomisabofifas.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/eMV0RK1/power_music_workout_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/9ajbjhb/cookies_must_die_how_many_chapters.pdfIn PDF document text
    • http://turosofatilez.iblogger.org/dinabesajukigetap.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/d992ac50-7461-4baa-b179-84689f57ddca/29661200630.pdfIn PDF document text
    • http://masifegudogona.rf.gd/sentinel_24_gun_safe_code.pdfIn PDF document text
    • http://vujiwexamofone.rf.gd/gallery_wall_template_and_frames.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9b3bed-146f-428b-80dd-1f6455b72bd6/how_to_fix_my_husky_air_compressor.pdfIn PDF document text
    • http://zunasolaxugi.epizy.com/36629908319.pdfIn PDF document text
    • http://ralununajopupe.epizy.com/42921462647.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBC 5388 bytes
SHA-256: 8b181cfb57351ece2c563efa5c8d2969b7f8dc894dfac65cd9589b6892c12a26
font_01_sfnt_off0000ddf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF1 10128 bytes
SHA-256: 0b1096776e36f941cb5605b972de38283244d7fc97d5a4d12013c8378a4e75b8

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