Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf3ea2204b518dd…

MALICIOUS

PDF

76.0 KB Created: 2021-04-02 08:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05c483dbf70b2f19e525fd91836f931c SHA-1: aaf744b65bd239e912e1b74a0b18ef800e00844b SHA-256: 0cf3ea2204b518dd9c3de5a57e356a2a92155f393000d90c773a2a64836f310a
186 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://jottigo.ru/wix?keyword=lafayette+county+high+school+basketball+schedule', is presented as a search result to deceive the user. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=lafayette+county+high+school+basketball+schedule PDF link annotation
    • https://cdn.sqhk.co/benibavagoge/igjhQhj/23642287442.pdfIn PDF document text
    • http://sojurufo.iblogger.org/werewolf_the_apocalypse_20th_anniversary_edition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383795/normal_6007ca853efa0.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/Xmib7jb/28307118274.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/9gehh3T/nobowudesikapivuzefowul.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/72c8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_6022c32491822.pdfIn PDF document text
    • https://govewusig.weebly.com/uploads/1/3/0/9/130969429/3198195.pdfIn PDF document text
    • https://runeburagaxe.weebly.com/uploads/1/3/4/6/134699488/c2237.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/gdjjhi6/my_home_bakery_food_delivery_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_600a2735f0947.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467278/normal_5fcf0bc383a9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_60467099e390f.pdfIn PDF document text
    • https://cdn.sqhk.co/dufikibagi/igfhiwf/japoganawesuvotorajelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_60218836e6afe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460241/normal_600324e7d3c73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fatisake/70570108926.pdfIn PDF document text
    • http://xupopav.epizy.com/how_to_be_a_good_reader.pdfIn PDF document text
    • http://pakifisaxere.epizy.com/what_do_you_say_to_someone_who_is_stressed_about_school.pdfIn PDF document text
    • http://pivirujifija.epizy.com/58906629103.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/how_to_use_mind_maps_for_problem_solving.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_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 5432 bytes
SHA-256: 02f7c1d4514b89bb3fbb559be86ef8c05faa2e9fa809fa6c9e7d59e868a94f86
font_01_sfnt_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 11008 bytes
SHA-256: 530b71fd2f3bba37af85ae7f0fba75f409e3297d37d8b071e2beab1dc8ac29fe

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