Malicious PDF — malware analysis report

Static analysis result for SHA-256 6048eb3716037579…

MALICIOUS

PDF

74.4 KB Created: 2021-03-20 09:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8993c1f21e0f8b6769d41e4df767406e SHA-1: 44ac72eff5ab7a417321e5798c70f9aac85288b8 SHA-256: 6048eb3716037579b7466dc070e637c9b76f8041555eade4d39d1a9b946750c5
126 Risk Score

Malware Insights

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

The PDF file contains an external URI pointing to a suspicious domain, identified as a link farm on disposable hosting. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The embedded URL likely serves as a lure to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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 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://seumenha.ru/strik?utm_term=what+is+needed+to+run+autocad PDF link annotation
    • http://gepexoliv.medianewsonline.com/wutufo.pdfIn PDF document text
    • https://cdn.sqhk.co/mewovegid/jiojdif/answering_specialists_inc_website.pdfIn PDF document text
    • http://negifowutagur.mygamesonline.org/bakosegetodavejebepog.pdfIn PDF document text
    • https://cdn.sqhk.co/verikiweneza/b9dz2ja/fadaromuzapi.pdfIn PDF document text
    • http://kalowodopole.mygamesonline.org/l_adjectif_attribut_et_pithte.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/20429685282.pdfIn PDF document text
    • http://kafofal.mygamesonline.org/aarushi_talwar_case_study.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/hfvjseE/76908523581.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/42689948523.pdfIn PDF document text
    • https://cdn.sqhk.co/widiroje/Igghad1/beginner_python_tutorial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28ac918-b7ff-4fe5-9b99-d1ab96edd9c1/bidiwalokawibisapeludozox.pdfIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_a0032537961f43a2b71dbd6eb5dd64c8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a7af795-f919-4920-b29b-111cb24e5aa6/ophthalmology_abbreviations_ou.pdfIn PDF document text
    • https://2e21b658-2967-4279-8f18-a03590b678a5.filesusr.com/ugd/f5e1b2_ddbf3142ee2b4346906370ca65b3dfed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a4e460-e815-4cba-89ed-30fb67c4798f/ninizojetorex.pdfIn PDF document text
    • http://jibimom.myartsonline.com/adobe_converter_online.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_36eab0c55fe3458a8779f2a0c459b048.pdf?index=trueIn PDF document text
    • http://zapusov.atwebpages.com/trials_of_apollo_book_5.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_off0000e478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE478 5008 bytes
SHA-256: b7d698e3f4c7c180b31d763566f25e7b6db9581c4592a1d34b3414a737340633
font_01_sfnt_off0000f587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF587 11692 bytes
SHA-256: ee4eefc0adad5fd0760b0f65ea1faa7ac3445455f81236ebfbbd1beb26ae592a

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