Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6696356be4012a3…

MALICIOUS

PDF

78.1 KB Created: 2021-03-09 06:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 69d0250dd90b79b4a59b19287dff7cc0 SHA-1: d10fefdf3dc101c0eb9d20ee6b033c3ea884434b SHA-256: d6696356be4012a37c59e16fec9a7a2cafa2465d69b1d312ffe448a2d874a871
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of numerous external URLs implies an attempt to redirect users to potentially harmful content or phishing sites.

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://leonvi.ru/award?keyword=bundesliga+2020+19+spielplan+pdf PDF link annotation
    • http://koponegigat.medianewsonline.com/is_blitzen_a_boy_or_girl.pdfIn PDF document text
    • http://itclick.info/beats_solo_2_luxe_edition_bluetoothfkr8s.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/76405341742.pdfIn PDF document text
    • https://zivukiwele.weebly.com/uploads/1/3/4/7/134749768/minunobogajexow-roroposoji-nitulupafimoxu.pdfIn PDF document text
    • http://forpost-electrica.ru/biwogobosuguziwomud3q3d.pdfIn PDF document text
    • https://lomowurepiv.weebly.com/uploads/1/3/1/4/131437546/lazinowizebo-kuduxax.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/rodemipazomitewodori.pdfIn PDF document text
    • http://lakujalinifibo.mypressonline.com/vugitaxefaba.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/tahoe_boat_owners_forum.pdfIn PDF document text
    • http://vovality.club/king_lear_act_2_scene_1_short_summaryrrig9.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/zivotiwudosevozazono.pdfIn PDF document text
    • http://alsamcctv.com/grendel_book_online_freey0u4s.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/50e49cc5-abdf-4cbe-b437-11aebfc786cc/26680658094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed0c9d5-a943-4a7d-8896-e841b98609ab/2504491212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89889e30-61f2-4246-9bab-c833c029dea1/gepijiv.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/jenkins_dotnet_core_deploy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84be28f1-d024-4697-89b4-e1b19965dd24/63502019756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4316dd4-acde-4ac4-bb8f-af00c1bac97e/toterodoxakawefudebaretor.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/light_relief_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10035777-17b3-4c60-9902-ff51b86e6cf4/24309457268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df404e75-eeec-4f00-85d4-f4f37dc50021/xovekezes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d7e013-9272-4ba3-bc69-73c32ba6630e/tisiduzuvogijisokesawiw.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_off0000e691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE691 5644 bytes
SHA-256: dc24aff3257d0e9bcb6e930eaf6146e44ef5001aff23fe5130df065642fd956f
font_01_sfnt_off0000f9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E1 16112 bytes
SHA-256: 787d3e9586a5f41e619ddfecc96f4d5ac94c97ff791b1a36972ab70a0e5acc08