Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f54787440fe4f6e…

MALICIOUS

PDF

80.0 KB Created: 2021-03-10 07:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b40a4f7b2efe676ec3e1eb92a1e7ebd3 SHA-1: 9fc6437162c20fb2e87653318577ad4aa2393e60 SHA-256: 7f54787440fe4f6e2b21368395439dc923ac23b2ac690935e466855e34936079
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. It uses brand-impersonation credential phishing. 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 0.9964

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://zelerajolames.weebly.com/uploads/1/3/0/7/130776056/6054543.pdf.
  • 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://lozipotod.ru/strik?utm_term=why+was+the+gold+rush+important PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487888/normal_603ba89cdd388.pdfIn PDF document text
    • http://wimuzawoxi.getenjoyment.net/gezaritosok.pdfIn PDF document text
    • https://zelerajolames.weebly.com/uploads/1/3/0/7/130776056/6054543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425214/normal_5fca06655206c.pdfIn PDF document text
    • http://lovechat24.club/16960433395l1823.pdfIn PDF document text
    • https://vuxofuta.weebly.com/uploads/1/3/4/2/134235669/finupab.pdfIn PDF document text
    • https://xuxufidumexed.weebly.com/uploads/1/3/2/6/132681394/tozamawokirubiwij.pdfIn PDF document text
    • http://wopebexe.66ghz.com/67743142485.pdfIn PDF document text
    • http://lolkek.xyz/linux_for_beginners_2020tvmao.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/negation_in_bantu_languages.pdfIn PDF document text
    • http://tosemuzariku.iblogger.org/foundations_of_behavioral_neuroscience_9th_edition.pdfIn PDF document text
    • http://rafale.store/bejetuvorasexawofpcxoo.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/the_giver_ch_6_summary.pdfIn PDF document text
    • http://velixone.66ghz.com/descargar_splashtop_personal_apk.pdfIn PDF document text
    • https://nelodukes.weebly.com/uploads/1/3/6/0/136085721/27e89935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471464/normal_60114dafa1c96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5fd0d59eaec81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_603423606d780.pdfIn PDF document text
    • http://astropsychology.website/kenmore_model_417_washer_dryer_combo_manualnpoi9.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/dabafakufusoloxumawigiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_a4d38d72dcc74babb9f416ae63ef7e7c.pdf?index=trueIn PDF document text
    • https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_e4d66f88750846058265de0931c4d530.pdf?index=trueIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/does_capricorn_man_play_mind_games.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_39a2792a9f084dae92466d1f8ad0753e.pdf?index=trueIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_dacb53fa01544a8e9078b30ca3cf91d0.pdf?index=trueIn PDF document text
    • http://benifolagalat.epizy.com/77681319128.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_36429d666471447fabe6946a0f421c6f.pdf?index=trueIn PDF document text
    • http://laxizibobi.rf.gd/32719864594.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_off0000f88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88B 5580 bytes
SHA-256: 6839697e46ea9cc1677160379273036a76eb33cf005e38fc3149dfb9a51cb069
font_01_sfnt_off00010b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B73 11400 bytes
SHA-256: 0bf9943e96160caf6163a907a5cce8a35c65b19f2f812b8352dfa55745d5464f