Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a16b6c3bcf7b91…

MALICIOUS

PDF

98.6 KB Created: 2021-03-19 07:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0210b4ff2bb397fc91c507be7da59719 SHA-1: 607ca02836c2b226644b919cfb0c98bf69d446e5 SHA-256: 07a16b6c3bcf7b911dfa4777672eb9175f59c6ffd5c5d4de1b2e890cd3f5343f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 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://gimoguvi.ru/award?keyword=apsrtc+pass+application+pdf PDF link annotation
    • http://fofiwafajelerax.sportsontheweb.net/wubogobaritufabusezaju.pdfIn PDF document text
    • http://reflectionss.space/14788363255vx8c1.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/storytelling_como_fazer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475854/normal_603526002a6c3.pdfIn PDF document text
    • http://tersq.space/45221828324uajzx.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/qghfggj/symantec_file_share_encryption_admin_guide.pdfIn PDF document text
    • http://interbankdigital.com/kefawafop9uqb.pdfIn PDF document text
    • http://zovitidagawas.sportsontheweb.net/kambikuttan_net_download.pdfIn PDF document text
    • http://resimpub.com/dyson_dc39_filter_wash93nzj.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/jifjhhf/word_sandwich_solver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471096/normal_6048212b6840a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447658/normal_60322431cdd4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_602025bec4839.pdfIn PDF document text
    • http://jefijunanupe.sportsontheweb.net/41346989436.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_12744aa8e6f04ba682f0a957253f103a.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_ded1939282d541699c2e63f31c204bb7.pdf?index=trueIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_375efc4fe59840068e85b5c0cb61a90b.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_a4f9d11da7c1488da3fb494a3962c457.pdf?index=trueIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_707524dfa2cb49bd92ecbc63c03fa2ac.pdf?index=trueIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_61549c762fbf45748fb3c2561fe7f84a.pdf?index=trueIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/noxusilumidibevawuro.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_51510615ac2f4a4fb6a00e01d38bb657.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 4808 bytes
SHA-256: 4eef49da55a500a98f7767f27624c8fa98f8fdb1806d989f3f60486630fea105
font_01_sfnt_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 26816 bytes
SHA-256: ca169583418ef963506e561651003c2bd543cf53bccb468f1ff2e14681547bf3
font_02_sfnt_off000133dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DC 10692 bytes
SHA-256: e677cb2e7dfd01570d985fc3917b6f70893305caf93b7d68face5c6754cabb3c
font_03_sfnt_off000158b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B7 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_04_sfnt_off00016d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D7E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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