Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ddc4dfa055ecd5…

MALICIOUS

PDF

84.9 KB Created: 2021-01-06 16:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3b61975de3f6ec21fbf9568125a0fadb SHA-1: 9e9bd4cd2afc2b06dbffe8651deaa257ac25900b SHA-256: 49ddc4dfa055ecd5d52352a9db01572c3a863af6ebad2cf00a04507d1303df41
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate this PDF is designed to host a link farm and redirect users to malicious infrastructure. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=whos+gideon+from+criminal+minds In PDF document text
    • https://susetizumuru.weebly.com/uploads/1/3/4/4/134461935/d9c28dcd3.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/fiahdii/65659602309.pdfIn PDF document text
    • https://cdn.sqhk.co/tagorotage/0rUDIBq/385_hidden_valley_rd_colorado_springs_co_80919.pdfIn PDF document text
    • https://cdn.sqhk.co/luvutagawata/Ghfhhii/jasupolimojatafe.pdfIn PDF document text
    • https://cdn.sqhk.co/jawezumate/gdMjcgk/nuxifudobufu.pdfIn PDF document text
    • https://cdn.sqhk.co/lokalofobox/gihG2O1/sultan_game_free_download_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/84bfa7e0-7bb5-4adf-82a7-1bc64c7ce8f3/81943615411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20380141-114f-4429-b846-9c7161b7393f/9608848842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44de46a9-bb6f-465d-919b-f538f7dcc58e/bukozawidanimupowaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ae28e42-70ae-4785-8895-74ecd5f1f24b/19166448714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df824121-ebcd-4558-899b-0b43f4671f0a/beyaz_dizi_yada_harlequin_kitaplar.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_off0001105f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105F 5448 bytes
SHA-256: 210045229446578c60249ecafdb1b264e31f4239f0c84b609a14cccab7a529b3
font_01_sfnt_off000122c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C8 10616 bytes
SHA-256: 195dda7a907b9625343555aea4a45e11e075f7be825a090836e77d84292a7e27

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