Malicious PDF — malware analysis report

Static analysis result for SHA-256 97abb23b63af7801…

MALICIOUS

PDF

75.1 KB Created: 2021-03-18 13:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c894f1e550171a750862f1cef51239e3 SHA-1: 9edaadd9520de1d15a410fb1f78c2ab9ec368f0f SHA-256: 97abb23b63af78013bf0f64b0c3666541c71f5f212421e121faab2a639ddaded
186 Risk Score

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://botokaw.ru/wix?keyword=michael+grubbs+one+tree+hill PDF link annotation
    • https://cdn.sqhk.co/jimumakevaji/jNheZFf/zewojixamum.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/Fgcgd1o/nasacort_side_effects_anxiety.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/kijchgo/visolonos.pdfIn PDF document text
    • https://xanibizodiwanid.weebly.com/uploads/1/3/4/6/134614549/togofewukeko_zitabiwe_jitulimilo.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/ajeAjiS/rap_hip_hop_r_b_radio_online.pdfIn PDF document text
    • https://kodetowunim.weebly.com/uploads/1/3/4/7/134701578/lalexubarofewadi.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/piwinalisimivumekowubido.pdfIn PDF document text
    • http://trendmobile.ru/muslim_couple_images_freegvd0g.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/hchdhcN/followers_for_twitter_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/ItSJtje/birdy_gray_discount_code.pdfIn PDF document text
    • https://cdn.sqhk.co/mojekuvugise/jbeijtx/blood_pressure_110_70_age_50.pdfIn PDF document text
    • https://baveretam.weebly.com/uploads/1/3/5/3/135314503/degemujoresewa_juvuvarafezij_rejolusirupux.pdfIn PDF document text
    • http://genusadnlo.space/its_kind_of_a_funny_story_streaming_sub_eng4d170.pdfIn PDF document text
    • https://cdn.sqhk.co/korebuxaguz/gcjjpjb/nature_hd_wallpapers_for_mobile_1920x1080.pdfIn PDF document text
    • http://universe1.space/balori_yorick_guideaup48.pdfIn PDF document text
    • https://cdn.sqhk.co/kujusiru/Hgjhjxi/45233099982.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://boxokur.epizy.com/lemetoxu.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_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 5208 bytes
SHA-256: 76b1a064ff2a7837c2d78b75a42d7e376d3a83634bd41bd4dc7bd196724b6da1
font_01_sfnt_off0000f80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 10920 bytes
SHA-256: 50b677acf1cc87694e1483b84b93c4ebb609548dde41483f95d8e5c39c1808a2

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