Malicious PDF — malware analysis report

Static analysis result for SHA-256 f847f719e906f6bd…

MALICIOUS

PDF

75.9 KB Created: 2021-05-24 19:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 75f68b305f9ba1275e7964f889f10f99 SHA-1: a1dd67423f2930e22c891cc682e5f1e800375dd0 SHA-256: f847f719e906f6bd470280705e1e64a726a25ff66c893a376f00ed5debc2d37e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, suggesting a link farm or redirection mechanism to host malicious content. The primary malicious URL identified is https://druttle.ru/strik?utm_term=bodyweight+exercises+pdf+download, which likely serves as a lure or initial point of contact for the attack.

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
  • 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.
  • 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://druttle.ru/strik?utm_term=bodyweight+exercises+pdf+download PDF link annotation
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/rasiwelujeb.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/9852484d64693.pdfIn PDF document text
    • https://xonasiwebe.weebly.com/uploads/1/3/0/8/130814782/9d22e41b.pdfIn PDF document text
    • https://lebudikex.weebly.com/uploads/1/3/5/3/135310552/1960321.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/1417056.pdfIn PDF document text
    • https://ganuzuvotaju.weebly.com/uploads/1/3/5/3/135304652/0e58f3.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/4e889f68-54ba-4972-bffe-090f7d925d25/81301214416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608ba8ed-be09-44b4-a20c-cb8c164216fe/7102758756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8edcf49b-d378-478b-83eb-89bc34ce9daf/lord_of_the_rings_character_names_for_dogs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9511a6d0-d8d6-4a9c-b29d-361c3182a016/68972928582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9821d34f-458d-47f8-b763-503ff62d7538/6041808531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a9d272-98a1-4ef0-8d07-a31fd524b776/marlin_60_scope_mount.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c213ee1-c4a4-490f-8d87-baac30b753b8/8629892463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5cb579f-0341-410c-8574-157b4201b055/kavitotil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd82eaf3-fbe3-4ee1-9db7-2e265cbfb176/deluxe_then_and_now_bible_maps_-_new_and_expanded_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9de075e-3eac-48fb-ae17-be12b2a7488a/trane_xl80_furnace_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d7114c-2a94-4bd2-8391-212116b676b6/mabolapuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea12492a-e1a9-4c70-b053-875215489107/97935258528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8ca9fd-c780-4a6d-9357-e2942320434f/29263966322.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_off0000e9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BF 5728 bytes
SHA-256: bee6ceea37c6f830113a32939eda9380982c1f8e6ef42b0e66f6887e5e46875a
font_01_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 10892 bytes
SHA-256: ff89fbf4fd09e23ef55a711cedc1d88cce0dff98940169ce003ff86b3530f907

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