Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea6be19665f24ce…

MALICIOUS

PDF

108.8 KB Created: 2021-03-07 20:09:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2ce8dce7e2eb7c1f3e3f321319f29f56 SHA-1: b0b91e3fbbd5f640384ab7a21eac6677f83269eb SHA-256: 6ea6be19665f24cecca64a8fddb8546c25d2172e515040cfe26cab02acfaed35
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm with numerous external PDF links. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting an attempt to manipulate search engine results or direct users to potentially malicious content. While no scripts were directly extracted, the presence of embedded URLs and the nature of the link farm heuristic point towards a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://druttle.ru/wix?keyword=ilocos+sur+zip+code PDF link annotation
    • http://daduriwikoniza.22web.org/19925654419.pdfIn PDF document text
    • http://retys.fun/hp_printer_carriage_stuck_right_sidey8ze6.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/rca_rtd317w_remote_replacement.pdfIn PDF document text
    • http://kexolifowuj.medianewsonline.com/what_are_symbols_of_authority_in_various_cultures_around_the_world.pdfIn PDF document text
    • http://alluniversity.fun/828686412411ndlp.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/zagapaxa/77772121994.pdfIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_2a0b04da746f40048ef225a30bcbe197.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lerezazo/2453803557.pdfIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_fae086f5ff8e452b957455f22287042b.pdf?index=trueIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_577a246e84f244ac8b23f93ba3f66433.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/fallout_4_curie_quest_guide.pdfIn PDF document text
    • http://xisirajotijejuw.rf.gd/degasovumeson.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/77427420745.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/67138163707.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/88969189375.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/iupac_periodic_table_2019.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/what_is_a_clinical_pharmacologist.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/79380726749.pdfIn PDF document text
    • http://zovodubevonul.epizy.com/24310958911.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/jogosobusipikefurak.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D07 4844 bytes
SHA-256: 0ae7fc740d6603c33e491520b32cc5c76fc0d0e7e5485f2ec0e61419261bf343
font_01_sfnt_off00015d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D96 16696 bytes
SHA-256: 754faddb854b8497b16dd4ce61a7f53c1799e50058d0759e7a53e35da4067e4a
font_02_sfnt_off00019111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19111 16112 bytes
SHA-256: 23e5e0a6ad5360bf10628433507e5aab34c42d7d900ccb2a5214949f2168b422

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