Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56cf4154ca777b7…

MALICIOUS

PDF

81.5 KB Created: 2021-05-15 04:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c4c71b99576cd48bae3c68654f1d263c SHA-1: d6eb0206049db843996f2f24fd252bd76bca5350 SHA-256: a56cf4154ca777b7be9455c109ff07f3908ede097466e6220bb83e0958d06791
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which are likely intended to lead users to malicious websites for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the primary URL 'https://lozipotod.ru/strik?utm_term=a+single+man+film+reviews' is suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://lozipotod.ru/strik?utm_term=a+single+man+film+reviews PDF link annotation
    • https://cdn.sqhk.co/vilubofi/jLviiZ3/nsk_spherical_roller_bearing_catalogue.pdfIn PDF document text
    • https://cdn.sqhk.co/rodofusavivi/gchbajf/zawidafamuwasibovakawama.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/iiheIhe/hockey_monkey_locations_ca.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/eGhaTIe/tiwumaguxom.pdfIn PDF document text
    • http://salizurewaki.mypressonline.com/big_data_visualization_tools.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/53d37e94-10b4-43c6-a820-ccdd18ca2393/hansel_and_gretel_story_with_pictures.pdfIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_5de6f4e92d9c4ec896568deb140f7d49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/adobe_reader_pc_windows_10.pdfIn PDF document text
    • http://suwuriru.onlinewebshop.net/43391445250.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/mandated_reporter_elder_abuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd4e5a9-4296-47c2-9e8b-322f0235e612/back-ups_rs_550g_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11dac7db-998d-4bc9-ac5a-e21e86e27fbf/how_to_setup_taranis_qx7.pdfIn PDF document text
    • https://deed868a-3c3f-4b0d-b3ae-f9ebe8a38c33.filesusr.com/ugd/95283b_403b23b30689490bbc7db425cfd19132.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/rogozaxivemuwuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e32f1ad-0310-4dcc-9142-7ebc2285e98e/14700908032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86233653-38a2-4c45-9ac6-56c6c67558af/my_cloud_ex2_ultra_firmware_downgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46acbc80-c977-46cd-8cb9-96cb0f5c8d48/26768462940.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_off00010177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10177 5228 bytes
SHA-256: d289a43e0697059e8008f560c69b207f1872af594a123443ee6823a60f38c9f9
font_01_sfnt_off0001133b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133B 10524 bytes
SHA-256: 6252eedd01594ebac973dd7ee1c8802da90ea921d62a28d9a4fde703566a19d3

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