Malicious PDF — malware analysis report

Static analysis result for SHA-256 725d06d526e39f21…

MALICIOUS

PDF

74.7 KB Created: 2021-06-04 15:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 98553000f67e30c7f977220a13cd2cc1 SHA-1: 587355fbc9e8de10429386cd89b3557af155b33f SHA-256: 725d06d526e39f21e1b3cc0ca926348901634b596334ae124b67d442199ff685
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://archism.ru/pbw?utm_term=emulador+de+android+para+pc+fraco+download PDF link annotation
    • https://rezomiwutamanap.weebly.com/uploads/1/3/4/3/134362688/4124634.pdfIn PDF document text
    • https://jerolukemotib.weebly.com/uploads/1/3/0/8/130874115/mawolujetu-jelape-fenelipiwe.pdfIn PDF document text
    • https://runufegoxow.weebly.com/uploads/1/3/5/3/135347372/gulukoped-dufevapedusaz.pdfIn PDF document text
    • https://razivixa.weebly.com/uploads/1/3/4/4/134498077/2869799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416318/normal_602be0bc6bb5c.pdfIn PDF document text
    • https://jupikojeba.weebly.com/uploads/1/3/0/9/130968920/fusavevudap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_6056dd8c74112.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/lilitenufuxur_walef_fowisemat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_606e0ecab0be0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_601424b1c4c72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376374/normal_5fcaabd98a90c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_60394c2e7f840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380079/normal_6031f2544bfb2.pdfIn PDF document text
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/wuvujuvinujin.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/0105b404-a742-4b9c-a869-733e81d76922/juxigowuzifenujiboxaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03d35ac-ec2d-487c-ab72-29075cbe47ed/wewijejudatababi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dffceba-e594-4d59-8cdd-ba1ca2ead6df/11731516355.pdfIn PDF document text
    • http://pukagij.pbworks.com/w/file/fetch/144471324/gudetama_tamagotchi_instructions_english.pdfIn PDF document text
    • http://gupiguna.pbworks.com/w/file/fetch/144534051/pinoy_movies_torrenting_sites_2019.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/shree_krishna_govind_hare_murari_ramanand_sagar_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef917c5f-1465-47b3-b012-3914fdf944c4/how_to_catch_feebas_in_platinum.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_off0000e348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE348 5172 bytes
SHA-256: a22ba1664c9bb46caa21ff84388d8b113fc4c0235d94d848b97ee5dd69f502bc
font_01_sfnt_off0000f4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DE 12340 bytes
SHA-256: edac1d4ed89d93f4e3774e5ba1d685b4a9fb4973431736bfe9fe864ab853393b