Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d58a3c6c19a5522…

MALICIOUS

PDF

79.3 KB Created: 2021-03-05 04:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a03c8570360ee71dd202c35f8aa60fa7 SHA-1: a8d863b10eb43f69d8c600a1a5240313cc2363df SHA-256: 9d58a3c6c19a5522a2177aba565ea6fb55224259993c07a677eac8af7121d953
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains text suggesting a lure for 'Dante's inferno 2010 movie online', and the PDF contains numerous external URIs pointing to disposable domains, likely serving as a link farm to redirect users to malicious content. No scripts were extracted, but the presence of many external links suggests a phishing or redirection attack.

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://midufefew.ru/strik?utm_term=dante%2527s+inferno+2010+movie+online PDF link annotation
    • http://bunnygummy.ru/71723290337jzmpg.pdfIn PDF document text
    • http://bestrongbyg.com/how_to_describe_an_interior_spacezwyx8.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/pesexazululogipene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408709/normal_5fef8ded2fcbd.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/pl_sql_book_download.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/jumping_jacks_play_area.pdfIn PDF document text
    • http://reduslim-shop.website/principles_of_management_clep_test_questionsuwyvi.pdfIn PDF document text
    • http://silkhfig.bid/25703567343enmyq.pdfIn PDF document text
    • http://plsale.pro/17687153330utk7q.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/vomat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424361/normal_5fc5da43bb398.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://uploads.strikinglycdn.com/files/b59c3240-d303-43a7-8790-60dabde607be/honda_eu6500_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ec2b38-fabe-4b25-af2e-36e68455088e/tifopiruda.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_a61f52638d5e42538cb0ee1464ff05d6.pdf?index=trueIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_c65c4f8af4a447d89a2b698da7bca39e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0054a193-458a-4354-9c6e-fc086336ff0e/83265417394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425ad701-d3ba-464e-ad6b-3709b487a934/what_is_level_1_foster_care.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA60 2996 bytes
SHA-256: d053b64f9f97b14d3423c5458163f89c902a8578e2aa1cb52ab7434fbd7f0fd6
font_01_sfnt_off0000e50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50D 5120 bytes
SHA-256: 3a47763c4286e9780ea22e6e21a93b9d965a463a203809cb3660b1f963a7c62d
font_02_sfnt_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 15960 bytes
SHA-256: 85c1b0a8862ebd9d81170d1ca179e9b80d99e09d5a8f4c4734008d068be06965
font_03_sfnt_off0001214e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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