Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58e4fe4a539ce40…

MALICIOUS

PDF

85.3 KB Created: 2021-04-07 21:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dc1e691572de57867075ad9ef05c7185 SHA-1: aaa711a634bfe3cbcd7d63a6e792479dc3f32e14 SHA-256: e58e4fe4a539ce40d36ec31d68e82df9e5dbd0a95b5765129babbf049bfb2b12
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. The document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://botokaw.ru/strik?utm_term=what+makes+a+man+lebowski+quote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481053/normal_605f8b6902fea.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/mobakot.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/jhaSPTV/red_buttons_actor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_601909a9de5c0.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/bsc_maths_1st_year_syllabus.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/gokubajopokikiteza.pdfIn PDF document text
    • https://nowabarabowuxo.weebly.com/uploads/1/3/4/3/134319250/2187192.pdfIn PDF document text
    • https://guxitokos.weebly.com/uploads/1/3/2/6/132681611/waregit.pdfIn PDF document text
    • http://xifasiv.getenjoyment.net/strength_training_program_for_athletes.pdfIn PDF document text
    • https://nakafafokebupop.weebly.com/uploads/1/3/1/4/131437029/xuwarifoxosizade.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/8193186.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/susavefofofisilodi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366362/normal_5fcb49626ac55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_60469741f3e81.pdfIn PDF document text
    • https://musevurimimurom.weebly.com/uploads/1/3/4/7/134711136/2846247.pdfIn PDF document text
    • https://kosazalosir.weebly.com/uploads/1/3/2/8/132815054/59d7c7679ee4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486758/normal_6040a946e3910.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/hcsJiav/vefadutiru.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/gdjdiaJ/car_driver_4_hard_parking_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e108c0fa-8e70-4110-aab7-e0d30777705f.filesusr.com/ugd/d9966b_6867d54b569e4e029db46bce8cf9182d.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_843ac25a733c48d587317a2626137ac4.pdf?index=trueIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_29ab0589f35140d699b30cba27b3b139.pdf?index=trueIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_39f06b8d7d144fab8495994a936ce769.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED02 5148 bytes
SHA-256: 01c5c101ea369a6494a430a9a2ce61b3baeb4d91c6047dc6923b6ab1c70a2f43
font_01_sfnt_off0000fe75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 10896 bytes
SHA-256: b8b2e96fb2f0de5df75c81436dde3fcf991bc3365b7cddf1b88608dc8b3278df
font_02_sfnt_off000123d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D6 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_03_sfnt_off00013905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13905 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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