Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc14b308332b1104…

MALICIOUS

PDF

60.8 KB Created: 2020-11-13 02:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 72c91441a8cd40a03698881ac89b84ac SHA-1: 978afef8405c937f8fdd290a65be1fe92618ffab SHA-256: cc14b308332b11041888510ee999fec59f39098dc5e7dcd328a32a6182cf4e13
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs, 'https://traffking.ru/123?utm_term=how+to+solve+probability+word+problems+7th+grade', is likely part of a phishing or malicious redirection scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, suggesting it's designed to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=how+to+solve+probability+word+problems+7th+grade PDF link annotation
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/1bcd6de6.pdfIn PDF document text
    • https://lajezufil.weebly.com/uploads/1/3/4/6/134636359/9604b268eec94.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/4e479ed7bc60a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/bridgewater_associates_economic_principles.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/nofagedifasovaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/open_file_in_browser_using_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f915b9-c075-450e-92f0-e666769aca38/33269064894.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/shareit_app_download_free_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/27313922578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd02ce4a-50df-422f-9670-7f52a2c868d5/transitional_words_and_phrases.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/vogalopoxiwubivewe.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_off0000ad7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7F 5808 bytes
SHA-256: ba2a3e597dbbef106b6a02016c454319006aa638e4ba94627b510daac4005d47
font_01_sfnt_off0000c135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC135 10336 bytes
SHA-256: 49f86f8726cbec03bb5e046f0c6285735138387015672132ec576cb54d0eaba2

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