Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3c1a08e4d357c9…

MALICIOUS

PDF

66.8 KB Created: 2021-03-08 08:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e325d2e395009fa2f6934b68861e581 SHA-1: 96f2ea41bdca739468cbf038399a92b503803921 SHA-256: 3a3c1a08e4d357c996f6476cf4d1317cd294065b50e25fe733981ade2026d34a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. While no scripts were explicitly extracted, the presence of external URIs suggests the document is designed to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=honeywell+total+connect+thermostat+troubleshooting
    • http://chestlune.online/46143523032awexv.pdf
    • http://teksalle.xyz/dujuxoropoloriladqynpz.pdf
    • http://gatorama.space/fupasokugozutisdp6m7.pdf
    • http://dmdmassage.com/zavuwetetezipififelouunk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ganubifirigevi/newry_reporter_death_notices.pdf
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_9606b7ad01ca44ae86198edd56baa39e.pdf?index=true
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_d3a83c22f7ec4c60aa5ee314e0a1e197.pdf?index=true
    • https://s3.amazonaws.com/sabegokek/booster_theme_free.pdf
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_5d538f3592b7412f881f9a9efdd161ea.pdf?index=true
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_751562e3575345dab9dae813110d68f8.pdf?index=true
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_e266f88ac84d4438a9c7fabb9680b20a.pdf?index=true
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_77d5462ebdd6494d81d61d6ac8a76162.pdf?index=true
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_b99a6a5db9f04aa68d90e6c15d2136c4.pdf?index=true
    • https://s3.amazonaws.com/magapeguwabe/kowojozusawe.pdf
    • https://s3.amazonaws.com/limepusotanal/vimagapubokoserasojijefax.pdf
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_b5e22c5f613a4410b000b7eca63ffd0e.pdf?index=true
    • https://s3.amazonaws.com/potamotaz/wpf_itemspaneltemplate_uniformgrid.pdf
    • https://s3.amazonaws.com/waxegatulo/replace_function_in_excel_sheet.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_off0000c9fe.bin
227d0483509e8c1d669cc91a9ca12a56ab65ffbbefee224acd0a004f3c14b4e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FE 5508 bytes
font_01_sfnt_off0000dca4.bin
70cfe9c9bbfca314d7b5a9d8b9f3a62431abec15e7673d3f62307f6aae7ef44d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 9672 bytes