Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8162e40d55eef48…

MALICIOUS

PDF

74.1 KB Created: 2021-01-14 20:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4805141ba570c58178e54d341690b724 SHA-1: b32b9dbe382b7cfcfec5e59b28d99130818d49eb SHA-256: e8162e40d55eef4841b144a175832e19ef3588c6d3fd28856834bf1da8b8d392
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and it contains a large number of external links, indicating a link farm or redirection scheme. The presence of embedded URLs and the PDF structure suggest it is intended to direct users to potentially malicious external content, likely for phishing or malware distribution. While no scripts were explicitly extracted, the heuristic 'PDF_SEO_LINK_FARM' and the numerous URLs point to a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=the+prince+and+me+2 PDF link annotation
    • https://site-1174373.mozfiles.com/files/1174373/barrett_jackson_on_tv_2020.pdfIn PDF document text
    • https://sapilijufidukuw.weebly.com/uploads/1/3/4/9/134901451/65f3b3.pdfIn PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/5840779.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/gdzidij/bingo_winner_certificate_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457312/normal_5ff2b53c47027.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/gitipelut/nufejuxodokewomupi.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/copenhagen_tourist_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/4_bit_adder.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/dance_bar_2019_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/elements_of_musical_theatre.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_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 5184 bytes
SHA-256: 67ab989b60bbdd65a1d3a17bb51eb4496d2310ca76dfb6a454d7ee4c8c40eb59
font_01_sfnt_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 13220 bytes
SHA-256: 06c5c8f60584244d37c0c4245f64e8dbf5806b90a706438221732f67c6455033

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