Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9d5d056daa3fa7…

MALICIOUS

PDF

78.8 KB Created: 2021-04-15 14:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fe00477d31efa5194eaa12d08faf2838 SHA-1: 2aa3f9fa53d04b7f65653ca71d760f11a9852b3e SHA-256: fd9d5d056daa3fa7cb20b16adf4b9f2f6cfea8d43ea9d876c1877f73b9e9acd1
166 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to printer setup, which is likely a lure to encourage users to click the embedded malicious URL. The presence of numerous external links, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://vilenefex.ru/strik?utm_term=how+do+i+setup+my+samsung+m2020+wireless+printer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376601/normal_5fd035a642870.pdfIn PDF document text
    • http://butixizofim.22web.org/filsafat_imam_al_ghazali.pdfIn PDF document text
    • https://bosupazalo.weebly.com/uploads/1/3/4/4/134473359/sezidiribafug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470826/normal_605bfb986c785.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/rixavogokovidr698u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426557/normal_605d78dddc70f.pdfIn PDF document text
    • http://gopikapi.22web.org/cap_123f_building_planning_regulations.pdfIn PDF document text
    • http://pubgmobiie.com/national_aboriginal_and_torres_strait_islander_education_policy_1989r0evu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413719/normal_5fedeef48b05a.pdfIn PDF document text
    • https://feruvemigik.weebly.com/uploads/1/3/4/6/134693586/rejozodunozob.pdfIn PDF document text
    • https://zugowexilib.weebly.com/uploads/1/3/5/3/135349829/gekasuxakafamub.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/7bb4089e81.pdfIn PDF document text
    • http://reduslim-europa.site/01_chevy_silverado_wiring_diagramp5ppd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tininababa.rf.gd/75012544320.pdfIn PDF document text
    • http://nodufezazu.epizy.com/79374906189.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/kingdom_hearts_union_x_keyblades_guide.pdfIn PDF document text
    • http://turulukovulipa.epizy.com/overwhelming_infection_is_one_of_the_most_important_causes_of_death_in_burn_patients.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/dusakezarazabadoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/33174606502.pdfIn PDF document text
    • http://gusubozavagu.epizy.com/queen_s_blade_spiral_chaos_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/what_does_lsc_stand_for_in_special_education.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_off0000f6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 5708 bytes
SHA-256: a96d12cebe2b91530504cb5383dff723597834df450620a2377f794462142bf1
font_01_sfnt_off00010a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A67 10304 bytes
SHA-256: 59310a0480293208c78b82960a97d6a4f779fde23e452f47d99414aca1bcd012

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