Malicious PDF — malware analysis report

Static analysis result for SHA-256 202d954328acffaf…

MALICIOUS

PDF

69.9 KB Created: 2020-11-10 14:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 399d12174025ba42632702c109db98bd SHA-1: 17f57a80c50e0e39b83d7ac66fe5b6a00a462ca1 SHA-256: 202d954328acffafa22292d31fb3515c0dc34da63c87aafcbcd86161e4e208d4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, including a link farm detected by heuristics, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate maliciousness, with the PDF_SEO_LINK_FARM heuristic pointing towards a phishing or SEO abuse tactic. While no scripts were extracted, the presence of embedded URLs and the overall structure suggest it's designed to lead users to potentially harmful external sites.

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/aws?keyword=fund+balances+in+governmental+accounting PDF link annotation
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/6301211.pdfIn PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/ba8753.pdfIn PDF document text
    • https://nizozunolo.weebly.com/uploads/1/3/4/3/134396810/3ad3657169cba.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://s3.amazonaws.com/wukevirenesu/22403500475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59cbfe1b-a7b6-457f-a91a-64dc3f891b76/madiramata.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/duwerulijaropinavogizuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/word_365_page_numbers_start_on_page_3.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/cultural_landscape_rubenstein_12th.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/delete_badoo_profile.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/8357733415.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/seferojukupexava.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_off0000c8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F3 5296 bytes
SHA-256: 3539687d5e4565301f611e06310ca3f4bfbfa6dfd5d4f87dbfd22db0417af714
font_01_sfnt_off0000dad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD4 9724 bytes
SHA-256: c859ef9e12f4647ed0767df85e77f963a723e0451c7450609abe76b66ff62f1f
font_02_sfnt_off0000fc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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