Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da848b359fc1261…

MALICIOUS

PDF

72.4 KB Created: 2021-03-09 11:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6077e0ec3949bb7e61d17dfaad27a841 SHA-1: 49097397e6946c4681c79cb345cbd442a7ee2b44 SHA-256: 1da848b359fc1261485081cddac69d2a340a230ef1b174c5d1de9a9087d4d156
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with at least one pointing to a suspicious domain ('golowaki.ru') and others to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/award?keyword=smoke+on+the+water+solo+tab+pdf PDF link annotation
    • http://loveantravel.xyz/gixowuxejugikubopawuuues.pdfIn PDF document text
    • https://milelujip.weebly.com/uploads/1/3/4/8/134861654/ca1b2acee89c.pdfIn PDF document text
    • http://emmetrix.net/annabelle_2014_tamil_dubbed_full_movieymrus.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/what_size_are_brandy_melville_clothes_uk.pdfIn PDF document text
    • http://003-center.ru/how_to_calculate_interest_on_a_line_of_credit_loanmuutw.pdfIn PDF document text
    • http://zebiripu.mygamesonline.org/alu_alu_packing_machine.pdfIn PDF document text
    • http://good-production17.site/fexopadu8fno1.pdfIn PDF document text
    • https://rebadezoj.weebly.com/uploads/1/3/6/0/136027304/gedijita.pdfIn PDF document text
    • http://pedugubugof.mywebcommunity.org/human_geography_meaning_in_marathi.pdfIn PDF document text
    • https://zebakikalelu.weebly.com/uploads/1/3/0/7/130775248/7788013.pdfIn PDF document text
    • https://jagalanir.weebly.com/uploads/1/3/1/0/131071056/f430499.pdfIn PDF document text
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/bikenedotaxeta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_22545fda57c240e086cf7cd9e359729c.pdf?index=trueIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_d7837393dd13405084867055f70f8d8e.pdf?index=trueIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_38fc1d520e55486584d2fb92e9a3cf5f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/how_much_does_macys_pay_full_time_employees.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/7889726520.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_f82e5dd637ab4f7f80534909a310e8bf.pdf?index=trueIn PDF document text
    • http://jowokepo.atwebpages.com/easy_money_cyberpunk_2077_glitch.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_a20b21c6a5c040b2836ddf9ce9c42378.pdf?index=trueIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_528b9aad2cc742dfa0df60bfb5e13518.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/used_to_would_exercises_worksheet.pdfIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_2aaee414e8824d6ea8eee15c74e627c6.pdf?index=trueIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_b2f476479e8b49af8dfc809131867617.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_15361a0ec0854a6e8493bd64b357941c.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB4 5680 bytes
SHA-256: 9aa223f727925c12090a85f22384a9bb050222b288236d59cbfc493e1a174bce
font_01_sfnt_off0000e2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E5 15160 bytes
SHA-256: 8a3e560b83ec7e09729ad62fcd61b332e6bd17bf5b75439152c548f801438354

Open this report in the interactive analyzer, or submit your own file for analysis.