Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a1b488483f5d83…

MALICIOUS

PDF

84.9 KB Created: 2021-03-05 22:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9db4ff879e94df611bb46fd7a1b16107 SHA-1: d019409aa069bd7351e7afed12567bdb86d62242 SHA-256: 75a1b488483f5d83152b1987b7cb70ff17073ece4bc0a4fac716574bc0573f9a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=how+to+do+flowchart+in+word+2016 PDF link annotation
    • http://safijejog.mygamesonline.org/html5_and_css3_tags.pdfIn PDF document text
    • https://gilaxisob.weebly.com/uploads/1/3/1/4/131406303/214777.pdfIn PDF document text
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/lezunowojemat.pdfIn PDF document text
    • https://jogemubo.weebly.com/uploads/1/3/4/3/134321321/panov.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/igbhfLw/99243531152.pdfIn PDF document text
    • http://tabelib.iblogger.org/88828558414.pdfIn PDF document text
    • http://gopadaxin.mywebcommunity.org/kevuviketedexelus.pdfIn PDF document text
    • http://vixesun.iblogger.org/in_calculus_what_is_a_limit.pdfIn PDF document text
    • http://menazubuta.iblogger.org/the_lion_king_full_movie_1994.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/cro2hbB/41756318357.pdfIn PDF document text
    • http://goduvide.22web.org/excel_bedingte_formatierung_leere_zellen.pdfIn PDF document text
    • https://latiratigu.weebly.com/uploads/1/3/1/1/131164156/loxivigede.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/87109750173.pdfIn PDF document text
    • https://razomidubijime.weebly.com/uploads/1/3/4/3/134395635/a6bc45a0c9d53.pdfIn PDF document text
    • https://dakubazelup.weebly.com/uploads/1/3/1/4/131454222/9421695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_b7dbd29175af44e796477fa55d61796f.pdf?index=trueIn PDF document text
    • http://zagofij.onlinewebshop.net/york_diamond_80_furnace_no_heat.pdfIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_f9cd9677bffe420680074555b76d1219.pdf?index=trueIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_d705920555644d63821f8f3f09a4b5ff.pdf?index=trueIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_dad8e5407b16494a9d542a52b57165b5.pdf?index=trueIn PDF document text
    • http://zikoliduxa.atwebpages.com/92851860558.pdfIn PDF document text
    • http://nupituf.epizy.com/1001_arabian_nights_richard_burton.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_86d795c8c04e4d4ba41ef542fcd75d32.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D79 5464 bytes
SHA-256: 97fc9610bca5dab1795b6e7c864fad97e4814d3205d04c1672639244ba27f2b9
font_01_sfnt_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 11188 bytes
SHA-256: 8645790c979d0b44c45e88ece3e1904abd3b4e42a47efb3bfd2a83e01730293e

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