Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9a62b1a32c5f6c…

MALICIOUS

PDF

78.1 KB Created: 2021-03-11 12:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 03bdd23a780dd2b9776b8826f8f99200 SHA-1: 313d96f09aba8469568549423ab004f6a0b76892 SHA-256: 9f9a62b1a32c5f6ceb8953e9eeed405e2f6d9061fd247a2ed4f4948560cbd490
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/123?utm_term=format+json+sublime PDF link annotation
    • https://cdn.sqhk.co/susopavazane/jijcgeE/wirawifisovojisofevid.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/how_to_get_rid_of_poison_ivy_rash_fast.pdfIn PDF document text
    • http://mukesuzovuvo.22web.org/95362407034.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/ogeggia/pevusuluridowuva.pdfIn PDF document text
    • https://cdn.sqhk.co/guletema/ibm3ijD/new_bollywood_songs_2020_download_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/HHjbgeH/robotics_engineering_degree_requirements.pdfIn PDF document text
    • http://fedezin.scienceontheweb.net/66501736138.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/64946687889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujapoguxesak.myartsonline.com/what_types_of_intermolecular_forces_are_present_in_ammonia.pdfIn PDF document text
    • http://tujevudaxuxos.epizy.com/gozugebifudolakezagisun.pdfIn PDF document text
    • http://faputigumajo.rf.gd/73688449708.pdfIn PDF document text
    • http://nogevas.epizy.com/can_you_treat_dog_mange_at_home.pdfIn PDF document text
    • http://bobakazof.epizy.com/delutugevokevaruganatiwo.pdfIn PDF document text
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_1988a4bc364046e9b12b0f3e8d56b0d7.pdf?index=trueIn PDF document text
    • http://zitasixan.atwebpages.com/what_is_management_and_administration_fees.pdfIn PDF document text
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_18530d494cfa4adb8b7b126f054c904b.pdf?index=trueIn PDF document text
    • http://rerorexemebiliv.epizy.com/varulibabafonorileva.pdfIn PDF document text
    • http://walagezumeg.epizy.com/78699083401.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_616b646e210d43769d87ae0a84e087c4.pdf?index=trueIn PDF document text
    • http://mafikaxavetubod.rf.gd/bella_s_lullaby_piano_music_sheet.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_off0000f363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF363 5000 bytes
SHA-256: aac2b00db9a93c73d3caff082f3180dfbd152c28f08d62b1803b37d96d37b8f0
font_01_sfnt_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 11524 bytes
SHA-256: c7848c7519a115f8517426642da48861f15132beed2241d022638fa350708783

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