Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70e98863848ea86…

MALICIOUS

PDF

78.3 KB Created: 2021-04-30 02:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6573d33f8f299338e400a2443de65db9 SHA-1: 9649438ee6c6057364c3c161747fa30a522c5094 SHA-256: c70e98863848ea866333babf840d5a945c8ec7beba989efa5ab8d099eb187340
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 0.9992

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://soxebez.ru/strik?utm_term=reading+comprehension+questions+and+answers+for+grade+4 PDF link annotation
    • http://canonsburglake.org/gofuzolukopozekumoluxalim37em.pdfIn PDF document text
    • http://oneitstore.info/kitelazewuzejugunujunurysy1w.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/jd6iihc/debod.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonowuwig/aR8XJfX/red_ball_world_3.pdfIn PDF document text
    • http://bazufilonunax.iblogger.org/xevipovelidedovagozit.pdfIn PDF document text
    • https://kewojifusufiw.weebly.com/uploads/1/3/4/6/134662328/nulunowisol-fexiwafizoleno-xuxabewa-geledodonedez.pdfIn PDF document text
    • https://cdn.sqhk.co/dijawagag/hjc54Is/lulizerebaruxubokemuz.pdfIn PDF document text
    • http://waystep.site/what_is_the_word_dappled_mean8afct.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/8c1b9c4c71906.pdfIn PDF document text
    • http://conicppjry.bid/physician_assistant_emergency_medicine_residency_californiagfn4h.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/cBJgcUc/kabavumel.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/iNihjjw/zombie_apocalypse_survival.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/chdjbif/punakikodaxisupevuf.pdfIn PDF document text
    • http://steblin.pro/45135387658kunf9.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/6011899.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/juwifo.pdfIn PDF document text
    • http://yesnutural.space/vokekaperifesok7q6gg.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/T4fimiK/slot_games_online_free_bonus.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/ggchhij/kabaxutigil.pdfIn PDF document text
    • https://salubekera.weebly.com/uploads/1/3/2/7/132740515/sofebodolur-welotat-fedup-zaxalis.pdfIn PDF document text
    • http://car-den.ru/rozitkp9fv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://popomajuvuj.rf.gd/asuran_movie_blood_bath_bgm.pdfIn PDF document text
    • http://nedofej.epizy.com/cilka_s_journey_download.pdfIn PDF document text
    • http://tovetetuw.rf.gd/90562437218.pdfIn PDF document text
    • http://sesukunijekoti.epizy.com/toyota_jit_case_study.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_off0000f2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B0 5848 bytes
SHA-256: 6b8288cde87dd2cca4d0b2490ff487f45ee26c98c17a3755112ec833e2376013
font_01_sfnt_off0001068d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068D 10780 bytes
SHA-256: 162e231bcc19c44e319decd2529796b9714f189a30a57e5311c07e4adf2de4bc

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