Malicious PDF — malware analysis report

Static analysis result for SHA-256 002c82694bf560e0…

MALICIOUS

PDF

71.3 KB Created: 2020-11-19 09:31:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 45fa53aaf5eead7e14c210dda37571b8 SHA-1: 19f5387df869adb17f11c68ca5a9114e34552168 SHA-256: 002c82694bf560e070cea1da98e542e594a25a5d2fe25a208c3b98a6102e75e1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?utm_term=printable+worksheets+comparative+and+superlative+adjectives PDF link annotation
    • https://tepunejor.weebly.com/uploads/1/3/4/6/134636279/wefetu-zatisanezaxikar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5fa75b31306ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_5f99750907aba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423155/normal_5fb02e67bacb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f8a21628541e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465707/normal_5fac17cb80ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_5fb2c653b8977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5f912a1eb8542.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/11a228b3-40f5-4df3-9874-5fc51cff6f0b/cbsla._com_contest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2719bc-7436-4394-b4aa-1977446b3fbc/thomas_dale_high_school_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1085c6ba-5d3b-47a0-b91b-c3c4a59e6c8e/modorebanideg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff70d03-0a44-4625-aa79-0224ea4bf050/95074027840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1b8090-15ba-478a-a9ce-78ac5126fb3c/retoxenuwizuxezovidozav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11daef8-34b5-4d73-87f0-35d100f3c953/10965350447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322eef5d-917e-4b8a-aa5a-eef02bd2eb36/mpsc_csat_books_in_marathi_downl.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA68 5628 bytes
SHA-256: 351caf8a2a47d8ff19605b0a2b29aecd5b8e326408ebf81a9e20d8b7fcd033be
font_01_sfnt_off0000dd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD64 10664 bytes
SHA-256: d2c9001a8bc95bc4a0997460bb682d7aadb6ffa3e205c75165c90a73644914ff
font_02_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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