Malicious PDF — malware analysis report

Static analysis result for SHA-256 95306abbb744238c…

MALICIOUS

PDF

79.2 KB Created: 2021-04-20 23:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b85e137500d0b912266a31ce9def8367 SHA-1: 104972740758867d28d49e39f3c5b3fe2b2bc7f1 SHA-256: 95306abbb744238ccb7dd26faa788a0e082197a5992c82b7019185021bc50c41
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 0.9994

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://crophysi.ru/strik?utm_term=how+to+pray+for+your+own+death PDF link annotation
    • https://kazirevuteguzug.weebly.com/uploads/1/3/2/6/132681824/662bfbdce.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/396d65e.pdfIn PDF document text
    • https://jawenovexexadu.weebly.com/uploads/1/3/4/0/134012785/ruruxib_jekofipojeke_nasijeforaxamos_lesopokudiril.pdfIn PDF document text
    • http://lovupijuti.getenjoyment.net/tozajab.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/W6RUjis/91047834464.pdfIn PDF document text
    • https://mesikanuxiruk.weebly.com/uploads/1/3/1/6/131636832/bebeta_meviselaziv.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/zezidotoboxozuwejaj.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/e36ae58c.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/dalivudixosinunex.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/xeratifev.pdfIn PDF document text
    • https://xuwazoleludike.weebly.com/uploads/1/3/4/3/134325396/4ac8ac.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/0kWAxRZ/susapapogosatixazo.pdfIn PDF document text
    • https://besajiti.weebly.com/uploads/1/3/1/8/131856076/37f0ffe568.pdfIn PDF document text
    • http://logunesunoj.medianewsonline.com/parasitos_artropodos.pdfIn PDF document text
    • https://govalusazun.weebly.com/uploads/1/3/5/3/135325024/7269331.pdfIn PDF document text
    • http://jusefaw.22web.org/cimbali_m39_dosatron_manuale_italiano.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/kctjfqH/7_letters_on_the_plate_lyrics.pdfIn PDF document text
    • http://zijogodakenanaf.22web.org/call_of_cthulhu_rpg_investigator_handbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rovujanoro.epizy.com/19763530611.pdfIn PDF document text
    • http://xevupan.rf.gd/97878433281.pdfIn PDF document text
    • http://pazepoxi.atwebpages.com/saxophone_minor_scales_and_arpeggios.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/70136758929.pdfIn PDF document text
    • http://setiwol.epizy.com/rurugivudakokixug.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_off0000f73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73C 5076 bytes
SHA-256: e322ac01692ede3b3c2874917d29872f3e6b73ec50db3b7ee114a8e6a3cde890
font_01_sfnt_off00010891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10891 11000 bytes
SHA-256: d551cd9655df73222fa00e2f0bc2e1e2985fca0f7e3a4bcf6f5f9f329dbc9872

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