Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f3a6e14d8473ae…

MALICIOUS

PDF

78.6 KB Created: 2021-04-24 19:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a46494ef08a80bedbac0866a5dbdb77d SHA-1: 559484e31366dc320f6a5ceaca8a2eebcc48e069 SHA-256: f0f3a6e14d8473ae8b22455779f044a45c888d5df6c9f03979416562ee7ce4a2
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 0.9998

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://resalured.ru/strik?utm_term=what+god+say+about+mother%2527s+day+card PDF link annotation
    • http://topekabur.iblogger.org/neurocritical_care_status_epilepticus_guidelines.pdfIn PDF document text
    • http://fuxokubatasiju.22web.org/how_do_i_access_private_channels_on_roku.pdfIn PDF document text
    • http://wefinexof.iblogger.org/xavokisupinowodafunekoxu.pdfIn PDF document text
    • http://nerukuras.22web.org/company_performance_analysis.pdfIn PDF document text
    • http://gifipagi.22web.org/bacca_bucci_formal_leather_shoes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_6a2740735f814504a54e1b560e97e509.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/blogger_template_maker.pdfIn PDF document text
    • http://meganabinas.rf.gd/63684385349.pdfIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_107dbca0b0d644c7bf99f36ea712d67b.pdf?index=trueIn PDF document text
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_2713a2b41c0443b9a990a88ad39e238b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zowejunef/best_non_season_necromancer_build.pdfIn PDF document text
    • https://25cf7bc6-226b-4013-96fa-c64d334b7dac.filesusr.com/ugd/317e1a_ddba214e36404de888dcb69011dbac5b.pdf?index=trueIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_6e80310f4aed4ddc933e615f9c2bcee8.pdf?index=trueIn PDF document text
    • http://zasagugidi.epizy.com/22821014718.pdfIn PDF document text
    • http://femejuzi.epizy.com/does_total_fitness_do_nhs_discount.pdfIn PDF document text
    • http://dixasimoxipux.rf.gd/41481896108.pdfIn PDF document text
    • http://pudawetik.rf.gd/switching_and_finite_automata_theory_solution_manual_free_download.pdfIn PDF document text
    • http://pirapisanuton.epizy.com/berewexoxosarusejenopo.pdfIn PDF document text
    • http://vutuzirowu.rf.gd/fema_is_405_test_answers.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_off0000f3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 5608 bytes
SHA-256: 92217d74f16f929102bff44660ca5cc1e6ee13920f1a93ebeddbeb95dba40ae8
font_01_sfnt_off000106e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 11492 bytes
SHA-256: 21fbf8b44163db367fa1b3833f6e742fc90c55e6f3f2f85c438484c6ba1ae9d3

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