Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68714289a0bd595…

MALICIOUS

PDF

69.6 KB Created: 2021-05-11 15:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: be737634e6060c7b7335fe24d0eeb8cf SHA-1: 8587ec77c28cb4f03f6baa7c7038aa7719822fcd SHA-256: b68714289a0bd595a879024441962dad175023d536eca9ca0ec74485be79be55
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains a search query that could be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://maypoin.ru/strik?utm_term=britax+eclipse+si+car+seat+cover+removal PDF link annotation
    • http://rixujewo.getenjoyment.net/83731427749.pdfIn PDF document text
    • http://copyrightsupport-ig.com/woodturning_cut_paint_shop1barm.pdfIn PDF document text
    • http://pizanexezorok.22web.org/animal_wise_ted_andrews.pdfIn PDF document text
    • http://rineset.xyz/gesanefukidekuwiwibuzuvr2o3n.pdfIn PDF document text
    • http://gugezebaz.mygamesonline.org/penyakit_kulit_bisul.pdfIn PDF document text
    • http://stal-kemerovo.ru/rush_limbaugh_radio_stations_californiagrz4k.pdfIn PDF document text
    • https://pexasojurez.weebly.com/uploads/1/3/1/3/131381046/xovodet-mixirope.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/23456717707.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/51033385425.pdfIn PDF document text
    • https://nomumiti.weebly.com/uploads/1/3/4/3/134330837/63e1bf7d6e.pdfIn PDF document text
    • https://lejimawemo.weebly.com/uploads/1/3/0/7/130739028/fa2358.pdfIn PDF document text
    • http://pisodaseveporow.22web.org/atomic_structure_of_carbon.pdfIn PDF document text
    • https://nasamokazefo.weebly.com/uploads/1/3/6/0/136049887/b2b2694fc511c98.pdfIn PDF document text
    • https://zabepufi.weebly.com/uploads/1/3/4/6/134681717/wunawibaj.pdfIn PDF document text
    • http://juzajikadig.22web.org/welizazezoxawojuluv.pdfIn PDF document text
    • http://kugaraginoja.mypressonline.com/dojopefi.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/54315710632.pdfIn PDF document text
    • http://ligufotenoradod.iblogger.org/vigixovumoluxaxefij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumuvurerurulap.rf.gd/xopifiwikoken.pdfIn PDF document text
    • http://xabulupemoze.rf.gd/togipafe.pdfIn PDF document text
    • http://dozopedatofol.atwebpages.com/19913975313.pdfIn PDF document text
    • http://revudipepofaten.myartsonline.com/command_line_reference.pdfIn PDF document text
    • http://noluduji.epizy.com/64982590527.pdfIn PDF document text
    • http://xedonufil.rf.gd/beltone_hearing_aid_app_for_android.pdfIn PDF document text
    • http://wulevizoreb.epizy.com/company_law_introduction.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_off0000d2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B7 5256 bytes
SHA-256: 152a99dba4a5cd272b26e36bc5785e4aa5edb607ea2dbaa3fa0d8356081ac4e0
font_01_sfnt_off0000e489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE489 10048 bytes
SHA-256: 46a1be1eb913c1319919d75d41a0ae6627ee2adb1db17164c2bfeb6339143f7d

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