Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fae6210a9e9320…

MALICIOUS

PDF

80.5 KB Created: 2021-03-17 23:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6d4fee13d81fc42108b5873fe2ec0bda SHA-1: df739d1662a47fd9538268f06fda22466a80dfd4 SHA-256: 70fae6210a9e9320a0a81803a996f810c190e173462facb7ba3424759ce7ba79
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 0.9991

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://jottigo.ru/strik?utm_term=jlab+audio+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473656/normal_6014aaa632bcc.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/jgTjUYb/undertale_characters_wallpaper.pdfIn PDF document text
    • http://pepopaguwanutet.22web.org/nutone_intercom_doorbell_camera.pdfIn PDF document text
    • https://cdn.sqhk.co/bibobovezave/ozidiaL/star_wars_galaxy_s_edge_lightsaber_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490523/normal_5fd04547dfb06.pdfIn PDF document text
    • http://zawubitukete.22web.org/gevuwelevarate.pdfIn PDF document text
    • https://cdn.sqhk.co/gifidupuzuv/idoheUB/95325025321.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/hcJigjg/dibasic_sodium_phosphate_ts.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/ihcjegd/jolly_phonics_activity_book.pdfIn PDF document text
    • https://cdn.sqhk.co/tipesewete/9ijdgPq/daily_express_sunday_crossword_answers.pdfIn PDF document text
    • https://wagemerefav.weebly.com/uploads/1/3/2/7/132712282/wifir.pdfIn PDF document text
    • https://wewiloviwa.weebly.com/uploads/1/3/4/5/134585183/kaxutiku_nuroje_rusugopolige.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/jhgfWtR/car_racing_speed_simulator_city_drift_challenges.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420910/normal_6018a299cc7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_603274ba80c58.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/chcbiaN/mewoninusobebulolelu.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/ie2Libs/last_minute_hotel_bookings_london.pdfIn PDF document text
    • https://mogudigadoto.weebly.com/uploads/1/3/2/6/132695399/8a8bb65b.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
    • https://uploads.strikinglycdn.com/files/4b16ed99-db02-4406-8235-b2cc6d0286ec/what_does_the_raven_means_in_spanish.pdfIn PDF document text
    • http://figapow.epizy.com/mopedojuvepudatesigofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c2a283-c37b-4a46-855e-d57b6aacc869/somedafodojonukosunizeb.pdfIn PDF document text
    • http://gesovupa.epizy.com/15893807609.pdfIn PDF document text
    • http://mageparojepu.epizy.com/nabeludixifupififoxom.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_off0000f0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CE 4620 bytes
SHA-256: 7cb12370a9919797d1f652bd15fa2bc69aba0ada7ea7c5e092c32aed1e8d641b
font_01_sfnt_off00010099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10099 11276 bytes
SHA-256: 1115c72a2213793b3e45c0918ef5f4ffa68b564be62260896fbad6a911253cb3
font_02_sfnt_off000126e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3