Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed8744bd8249c59…

MALICIOUS

PDF

78.3 KB Created: 2021-03-30 04:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fdcff2d7e1cb3c2c0386daf72a69013 SHA-1: 3a131abfa089766088966dfc2ca300a758142d2b SHA-256: 9ed8744bd8249c5994c8a96124289fc2cd03ef40ee4c04267c04dc094a6e4f18
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 high likelihood of malicious intent. The heuristics reveal a significant number of external links, suggesting a link farm or phishing attempt. The embedded URLs point to various domains, some of which are flagged as unknown or potentially malicious, further supporting the phishing or malware distribution vector. No scripts were extracted, but the PDF structure itself is used to host and link to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=foot+and+ankle+exercise+pdf
    • https://cdn.sqhk.co/wufotubi/hbiiija/25518859553.pdf
    • https://bupulaserora.weebly.com/uploads/1/3/1/4/131437689/midadavogeni.pdf
    • https://naxaletuzo.weebly.com/uploads/1/3/4/5/134508506/dca487.pdf
    • https://cdn.sqhk.co/zapusukajev/yIIhhij/50262901640.pdf
    • https://cdn.sqhk.co/xizefonuma/9wDYtif/53902625814.pdf
    • https://cdn.sqhk.co/kavuweduti/gd2Fbjh/employment_application_form_california.pdf
    • https://wuganinaviset.weebly.com/uploads/1/3/1/8/131871642/8259158.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kenuzuwemonuda.epizy.com/68245378566.pdf
    • https://s3.amazonaws.com/julexekubaj/stihl_ms_250_parts_list_diagram.pdf
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_429d60bff183414682f98a4356e2daa7.pdf?index=true
    • http://rukanaka.epizy.com/25920800156.pdf
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_94b8e238736d413f9be12e340847d6d0.pdf?index=true
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_bba3fe62983944f5b21762602b0b313d.pdf?index=true
    • https://s3.amazonaws.com/rekawexuretowo/refusupifa.pdf
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_6d4fe070bd1e4b61a4372cad5e7463e3.pdf?index=true
    • http://beperedusewigu.epizy.com/duzudaleja.pdf
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_4daab122b72e43e8a1583eb3e2e48d68.pdf?index=true
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_1601a276f03546a4aa72028b3a2691bb.pdf?index=true
    • https://s3.amazonaws.com/zijivevip/shashi_tharoor_inglorious_empire_free_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f631.bin
eaf209c8db1b69473eb9516f3e959d3f57e1092c872b07823665b4e6aa3558b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF631 5236 bytes
font_01_sfnt_off00010818.bin
420e38bca830d0a9dc0fd74d42005052cb99571e09d967405e7862d961cb14b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 10580 bytes

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