Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2b0f58f4c2f79f…

MALICIOUS

PDF

74.7 KB Created: 2021-01-22 08:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 182943c0cc038103de1c435ecdcacff6 SHA-1: e957d81e39b66cc92b68fbeb5e6140b7584282a8 SHA-256: 7b2b0f58f4c2f79fd3873c2ee627c7f32bcb004a1f2c303b846a1787b3b59b1e
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to suspicious domains and identified as part of a link farm. One critical heuristic indicates the presence of a malicious redirector link. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

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://traffmen.ru/123?utm_term=solon+science+olympiad+invitational+2020 In PDF document text
    • https://kidiveguworuriw.weebly.com/uploads/1/3/4/6/134677920/fatijim.pdfIn PDF document text
    • https://ludugekokokak.weebly.com/uploads/1/3/5/3/135313409/5734738.pdfIn PDF document text
    • https://gijajagilaz.weebly.com/uploads/1/3/5/3/135313732/a36f573.pdfIn PDF document text
    • https://jupoxoguji.weebly.com/uploads/1/3/4/0/134097256/fubobekegaxufet-gepuwugit.pdfIn PDF document text
    • https://kibidabusiben.weebly.com/uploads/1/3/1/0/131070702/4536b8e.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/zulifomivamanumu.pdfIn PDF document text
    • https://mujataza.weebly.com/uploads/1/3/1/8/131871468/motoboxorito.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/nonabafat/somatosensory_evoked_potentials_guidelines.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/bang_bang_movie_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/76414619697.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/hd_movies_free_for_laptop.pdfIn PDF document text
    • http://degejukifukux.epizy.com/benessere_digitale_google_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/3698140875.pdfIn PDF document text
    • http://wotisonuli.epizy.com/guided_imagery_relaxation_cancer.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/29160059625.pdfIn PDF document text
    • http://vikogen.epizy.com/nutrients_journal_template.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_off0000e4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C1 5660 bytes
SHA-256: d584595d35422473e6a170bedc0676549fb33a4b0eb8cb795f9dc9a6e8056caf
font_01_sfnt_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 11208 bytes
SHA-256: ca6766c587e433ceac641284c6cede46530c21b958f0511bc56a6674ed97edc7

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