Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2658b0b521bb95…

MALICIOUS

PDF

76.1 KB Created: 2021-03-23 10:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a2fee95c88bdbef3a115969baf79aa70 SHA-1: 373a803ae5988d805bd3d4fc67a2e8d84329e63f SHA-256: ca2658b0b521bb956422f8e6e10c4acf822d2d118f370b33b0ffff837b639988
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, suggesting it's part of a link farm designed to manipulate search engine results or direct users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to trick users into clicking through to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=the+amazing+spider+man+2+apk+free+download+uptodown PDF link annotation
    • https://cdn.sqhk.co/genizataxom/faieVgd/80665783264.pdfIn PDF document text
    • https://tepukijamuboze.weebly.com/uploads/1/3/5/3/135301813/6526405.pdfIn PDF document text
    • https://cdn.sqhk.co/wanowofimaz/jhcgbgh/54136615302.pdfIn PDF document text
    • https://dopizuledukure.weebly.com/uploads/1/3/2/3/132302960/ea8b27ca77ec72.pdfIn PDF document text
    • http://mmamba.ru/irregular_french_er_verbsv9kdk.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/joduvotitosenefup.pdfIn PDF document text
    • http://dejivuxa.mygamesonline.org/14447169054.pdfIn PDF document text
    • http://googsnat.space/cml_treatment_guidelineqtg94.pdfIn PDF document text
    • https://wanuwajazil.weebly.com/uploads/1/3/4/8/134899981/bekavarokixo.pdfIn PDF document text
    • https://nanawoxemataxu.weebly.com/uploads/1/3/5/3/135332584/fegikiref_gilupidelajiz_xigadenavejeke.pdfIn PDF document text
    • http://merovew.xyz/non_deductible_ira_contribution_tax_form51uue.pdfIn PDF document text
    • https://fewojejano.weebly.com/uploads/1/3/4/3/134348079/bebekip_vifoxi_kofuporajokamis.pdfIn PDF document text
    • http://megalit-korolev.ru/how_to_connect_zmodo_camera_to_new_router4ksgu.pdfIn PDF document text
    • http://furniture21.online/babunupageverawije4ao.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/72442589421.pdfIn PDF document text
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_7d87fc5e4cf04109b65afc031a3c785e.pdf?index=trueIn PDF document text
    • http://dezinolabebosod.atwebpages.com/24387743819.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_bae94b79e47c4e2aa6c357bc12e17063.pdf?index=trueIn PDF document text
    • http://wilaroxu.atwebpages.com/english_reading_materials_for_beginners.pdfIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_9912ad8ca39c49d1b7f33d578d32f673.pdf?index=trueIn PDF document text
    • http://zubiluwetij.myartsonline.com/curriculum_vitae_example_download.pdfIn PDF document text
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_f89ad46ca048451f8b6e7c6b3e6f9f61.pdf?index=trueIn PDF document text
    • http://kepewitibafef.myartsonline.com/bob_ong_novels.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_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 5744 bytes
SHA-256: 8e933461b2d422e03ec8202ea696a6dfe76d1ec402eb4214c39100e1639d2ad7
font_01_sfnt_off0000fe8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8B 10540 bytes
SHA-256: 58190fa53d93be9d0b11f50575407e5597076708cb139739f655dd46ba0753e4