Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f3e6183791faf8…

MALICIOUS

PDF

83.1 KB Created: 2021-03-18 12:57:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 66a29b2e34c1c968c48e094431ec7f11 SHA-1: ee695f89b3d68d192491b80bb3b765b1c192787a SHA-256: d4f3e6183791faf8254e771b18b8d3a3207cfedf54f350f18148f5a50aaf8f0a
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely part of a phishing or content-luring scheme. The document body, though heavily obfuscated, suggests a deceptive pretext related to a search query.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=de+donde+proviene+la+palabra+formacion+civica+y+etica PDF link annotation
    • http://hotsales-com.xyz/economic_systems_exercises_worksheet_answer_keycr13q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_6029909f27f17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391620/normal_603c5c246618c.pdfIn PDF document text
    • http://world-wild-shop.com/111867084433pxv0.pdfIn PDF document text
    • http://optarfes.com/46735003992dn3t1.pdfIn PDF document text
    • http://creamspait.xyz/rodifosupifbxngh.pdfIn PDF document text
    • http://comp-arenda.site/706760231622djo6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403543/normal_60099ea75cbb5.pdfIn PDF document text
    • http://tehnopolis.org/keto_reset_diet_recipesf0mtb.pdfIn PDF document text
    • http://findssldz.xyz/the_college_panda_sat_math_answerspj20k.pdfIn PDF document text
    • http://santand-es.com/teaching_english_as_a_foreign_language_free_online_courseyc7ns.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5ffd52caae05e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_da0b711ea4b44dafbaea7073038b6f1d.pdf?index=trueIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_01a6f2c65a924d0db04add0139d3bfd7.pdf?index=trueIn PDF document text
    • http://xowitulodif.rf.gd/62528210395.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/setipokad.pdfIn PDF document text
    • http://zewikomiwuzi.rf.gd/85880405825.pdfIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_04455f77c4874beab359ecf6b2950c76.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_ba4404e4cbd242349e5e0253661fd638.pdf?index=trueIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_ed60094c399b4c3aa30ea8acbe5a63e7.pdf?index=trueIn PDF document text
    • http://wuseruri.rf.gd/australia_and_oceania_political_map.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9D 5424 bytes
SHA-256: 3a9597fc7dedf2d4a5a1228fb8fa9ee2ad2ab3022aa29d274c35b9c8c3b6a573
font_01_sfnt_off0000fe07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE07 14100 bytes
SHA-256: 5430420bccb7fb6145765dac1cdf1ac24e0b55ebfad6bd9be08429f589d537b2
font_02_sfnt_off00012a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1C 16200 bytes
SHA-256: 7427c6bc67859b578149a261544bb1535a5c5cc5499c5bcf465df30433ecb59a

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