Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ea9ee2a40d2544…

MALICIOUS

PDF

100.3 KB Created: 2021-03-18 16:07:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 885b1cdaba25b434ae9205570d661004 SHA-1: 58f3322db9e03f0c9c5060ffc493d708fa647c4b SHA-256: 48ea9ee2a40d25449539b010db7aab6e6429a9bb306af6fa9d71f529b6bf9362
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it may be used to redirect users to malicious sites or download further payloads, potentially leveraging embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/123?utm_term=adblock+chrome+windows+7+64+bit PDF link annotation
    • https://falojixij.weebly.com/uploads/1/3/4/8/134878909/razim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445531/normal_5fe74b59ada49.pdfIn PDF document text
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/mexefav.pdfIn PDF document text
    • https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/508109.pdfIn PDF document text
    • https://setupazaz.weebly.com/uploads/1/3/4/7/134772318/raruwemixuxitetot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_5fdbf2cb7a593.pdfIn PDF document text
    • https://kusafulidofet.weebly.com/uploads/1/3/4/0/134017607/34b61f7772b.pdfIn PDF document text
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/buxozi.pdfIn PDF document text
    • https://betirowi.weebly.com/uploads/1/3/4/6/134661799/suxen.pdfIn PDF document text
    • https://zasufademebarav.weebly.com/uploads/1/3/4/7/134737005/renen.pdfIn PDF document text
    • https://xebolefijepipol.weebly.com/uploads/1/3/0/7/130739937/zujobu.pdfIn PDF document text
    • https://kofovozeregom.weebly.com/uploads/1/3/4/3/134313602/2793462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464732/normal_6017fd37e6553.pdfIn PDF document text
    • https://ninefajesazaga.weebly.com/uploads/1/3/5/3/135384029/dagidilovuj.pdfIn PDF document text
    • https://sawebegiwe.weebly.com/uploads/1/3/4/7/134706463/99b7379dbc2.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/xekibon.pdfIn PDF document text
    • https://rifubagozoj.weebly.com/uploads/1/3/2/6/132695416/xuzelogan.pdfIn PDF document text
    • http://vuxokiwi.22web.org/vidmate_ing_karne_ke_liye_gana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_60298629e3bbb.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/tevomenil/94981081782.pdfIn PDF document text
    • http://wixesikive.epizy.com/samuel_beckett_waiting_for_godot_download.pdfIn PDF document text
    • http://tuxefefili.epizy.com/wewumuzufalow.pdfIn PDF document text
    • http://xunevonobi.epizy.com/beats_solo_2_wired_manual.pdfIn PDF document text
    • http://sulorunak.rf.gd/wifanorivopefigazitapaka.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/beamng_drive_full_game_pc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E3 5576 bytes
SHA-256: 000000e938a62bb7fa5301e6f71d05678c8b73585eb07952490a4a22cfbe893e
font_01_sfnt_off000143d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D0 10688 bytes
SHA-256: b560845700dfb3319e4f74ebddb35ef42e18072864b02fc3f5568eb1743d9a56
font_02_sfnt_off000168aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168AA 17444 bytes
SHA-256: b9c07489e0906e548fd2321ea551ccb3831683513f6c0abb6df7e71ce3785494

Open this report in the interactive analyzer, or submit your own file for analysis.