Malicious PDF — malware analysis report

Static analysis result for SHA-256 418dc1ddbb8a6e4b…

MALICIOUS

PDF

66.2 KB Created: 2020-12-21 19:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8bfcfd668a3db486440af1c45d1be597 SHA-1: edfe57b871515fb701b91660d0fcb58fffece8b9 SHA-256: 418dc1ddbb8a6e4b0b63e60d85a8b840e1e80b80c20301cb0f73b53a84a74674
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffking.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to a 'voice recorder app in jio phone', aiming to trick users into clicking the malicious link.

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 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://traffking.ru/aws?utm_term=voice+recorder+app++in+jio+phone PDF link annotation
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/3320799.pdfIn PDF document text
    • https://dilopimejaz.weebly.com/uploads/1/3/4/4/134487403/834835.pdfIn PDF document text
    • https://noxetetejiv.weebly.com/uploads/1/3/4/3/134391164/8752747.pdfIn PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/nokawisazox_gabir_gakapimipima.pdfIn PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/3249150.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5c4adc89e1c4b8fdffd23/t/5fccf0ea0ab5d62febf37828/1607266539089/rutisov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c1bf331-7599-47de-bf43-c488ef343d5f/36528247906.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/bewiloj.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/jingle_bells_alto_sax_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/64808784740.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c02327a199023ace1db9/t/5fd65ff0df2f0204c2361d0c/1607884787218/20658579761.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ecf2df132613bbd760b1/t/5fce959780294c2e6bca5018/1607374231869/2019_pop_music_playlist.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ea87a3bf4b14abc2c893/t/5fce9bd133343530ab9e0aa0/1607375825496/71714283571.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfd9dcd610986319781dd0/t/5fe0dab7569e71716fb9d0a6/1608571576701/ditivopevoxikiwen.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_off0000c73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73D 4992 bytes
SHA-256: 1e3e2cd53231fddc9754618f310eec8312a198ff2d6fb6214ef98c090cb768e8
font_01_sfnt_off0000d83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83A 10564 bytes
SHA-256: f2bc95f51e42ef88230a57333359150ec408fcc0fa08e3841c03424f5c67e8fe

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