Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce2dff8f3d764c3…

MALICIOUS

PDF

90.3 KB Created: 2021-04-17 02:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc0de96c8283fa2bced6d296dbf3a45d SHA-1: 7f177925871814fc5965debe43b2e22aae33af40 SHA-256: fce2dff8f3d764c32f4b826857b56f773bc7f07faadc48cd7f6f2eeb52733f5a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains numerous embedded URLs, with a prominent one pointing to 'dafemum.ru', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, appears to be a lure related to English verbs, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/strik?utm_term=lista+de+verbos+regulares+en+ingles+traducidos+al+espa%25C3%25B1ol
    • http://dagomakiluje.iblogger.org/87332282474.pdf
    • https://cdn.sqhk.co/tinolaseja/gfFgdep/kitalelugiwotenokikurif.pdf
    • https://cdn.sqhk.co/tabuguran/gjHiegf/flight_simulator_2017_flywings_free_pc.pdf
    • http://zefazinofajowax.iblogger.org/12565622172.pdf
    • http://rabowodof.iblogger.org/takolugeb.pdf
    • https://cdn.sqhk.co/sesudegaruta/LF5hdig/wovavotalolubuzapawuwed.pdf
    • https://cdn.sqhk.co/doporaba/mhg4xja/indoor_painters_in_my_area.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gemosufijubimup.epizy.com/13227423317.pdf
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_a68e02b494b642df86c4a60ff6ae5c8d.pdf?index=true
    • http://kutunerepupikib.epizy.com/osteoarthritis_adalah_usu.pdf
    • https://uploads.strikinglycdn.com/files/f2bf3a60-8108-45d8-a949-5a6c46bc0039/zanetuwubikuzewa.pdf
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_ebdb1585bf0d4c87926d1c63c5e99155.pdf?index=true
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_7a0a91d8d1cf449e97d68ae8c9b4a4fd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c3971140-d23a-4697-a66e-60843bcd1050/what_is_pali_canon.pdf
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_a69d406f5ff140648d2724de286b9a20.pdf?index=true
    • https://s3.amazonaws.com/jizubisetebof/dalusek.pdf
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_32a6d1c44f9b453a80c136cd8f057945.pdf?index=true
    • https://s3.amazonaws.com/limepusotanal/proliferation_financing_report.pdf
    • https://uploads.strikinglycdn.com/files/1cb7be02-8fbd-4f11-b9d3-08a16e60e505/13955894940.pdf
    • https://09ec27ad-13b2-4d6a-9bba-a73d40af2dac.filesusr.com/ugd/309646_28ab806aa50e446985fbf8fb99191fe9.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c01.bin
44114f58f3c473b31ee490072f97cdb25a62872a6626cd32cb262db08b23a4ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C01 5592 bytes
font_01_sfnt_off00011eda.bin
bad5b0ac0a79efcc47ad1fe811c48c34967c2add84d0c189543801810b4137a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDA 10672 bytes
font_02_sfnt_off00014358.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14358 16204 bytes

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