Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a2d456fc96fb04…

MALICIOUS

PDF

377.2 KB Created: 2021-05-26 07:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c45358fb7e1595e74c3d3817f9d636f7 SHA-1: 505f83c6131f9ce7ffaccac7c09785e5ad36ea3d SHA-256: a9a2d456fc96fb049c1cc447640edcbc4987fa4cd36d33cf10ae698b70856b9c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'antiscalant chemicals', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=what+are+antiscalant+chemicals+pdf
    • https://mifokidosunatav.weebly.com/uploads/1/3/0/9/130969664/4597470.pdf
    • https://kutijodokijo.weebly.com/uploads/1/3/4/7/134706590/gadofikemik_kexujizevezovad.pdf
    • https://bepixumute.weebly.com/uploads/1/3/5/3/135302933/gunakopevo_diliwemedive_lizanumoge.pdf
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/lofedupomuligupux.pdf
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/jotudek-molonu-diwawix-nixizejud.pdf
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/vuduxizawukevadax.pdf
    • https://ruwaxejitoxa.weebly.com/uploads/1/3/4/9/134902813/tutol-kexekenesoj-samidazuxopigez.pdf
    • https://webuwexuzebonal.weebly.com/uploads/1/3/0/7/130775053/kojadagulafiwixafa.pdf
    • https://semirenuzunep.weebly.com/uploads/1/3/5/3/135325284/f812b3c09cf11.pdf
    • https://cdn-cms.f-static.net/uploads/4402246/normal_603970f41b234.pdf
    • https://static.s123-cdn-static.com/uploads/4369915/normal_5ffd5c397318f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tokit/zamef.pdf
    • https://uploads.strikinglycdn.com/files/8f70e300-fb77-4944-91ab-5a6fdd05b43b/quick_study_academic_nursing.pdf
    • https://uploads.strikinglycdn.com/files/3769b636-8437-4a2d-afdc-037d98009f50/vevukusopa.pdf
    • https://s3.amazonaws.com/zerejibixupav/73885874910.pdf
    • https://uploads.strikinglycdn.com/files/a2f1b7db-f6b6-41e0-9922-9db4bb73f1f7/world_war_z_pc_req.pdf
    • https://uploads.strikinglycdn.com/files/5bd19dc4-bbc3-4d45-a049-cc46ab38e62b/gakanigatoze.pdf
    • https://uploads.strikinglycdn.com/files/34701ce2-2f9d-4fbd-b295-44898fb7fe23/what_are_the_types_of_drawing_techniques.pdf
    • https://uploads.strikinglycdn.com/files/57f39993-48a3-4456-bb67-5c983f6a1c22/mockingjay_book_setting.pdf
    • https://uploads.strikinglycdn.com/files/8430b1d9-39cc-446b-b2aa-f30dc1964ec6/46535164440.pdf
    • https://uploads.strikinglycdn.com/files/62060b3a-86c5-405a-9e32-d1b447448c31/big_fish_game_manager_download_deutsch.pdf
    • https://s3.amazonaws.com/muxozuvalubi/subject_predicate_worksheet_10th_grade.pdf
    • https://s3.amazonaws.com/poresi/56462211743.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057625.bin
fc3e4b4f6d66cd4be7fc87edd66ecdee5322edcb7b90fd05cef0ee0f42afe5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57625 5084 bytes
font_01_sfnt_off00058743.bin
e95105137d5a5275129ee9d8e1e58edfb8bb5fa942d15e897cbd4426957ea40d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58743 13004 bytes
font_02_sfnt_off0005b39b.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B39B 16164 bytes
font_03_sfnt_off0005c8b0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8B0 4324 bytes

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