Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f048dfb870ecc80…

MALICIOUS

PDF

76.0 KB Created: 2021-03-11 20:56:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9ff53876f662a493d0a42299567e9eb SHA-1: 2cb7d9b702334992a5bcba3786a3a5ca5c8b06a4 SHA-256: 1f048dfb870ecc8063c2dc10e2b545b06d09c286e8038c3735921c2fd4165919
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and potentially phishing-related. It contains a significant number of external links, suggesting a link farm designed to redirect users to malicious websites. The presence of embedded URLs and the overall structure indicate an attempt to lure users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://dafemum.ru/123?utm_term=makalah+cerebral+palsy+adalah+pdf
    • https://cdn.sqhk.co/gobajejuz/hgrxVgh/parachute_chicago_il_60618.pdf
    • http://lnstagram-copyright-supports.com/kundalini_reiki4u0gs.pdf
    • http://techanomic.com/toca_life_farm_apk46gap.pdf
    • http://siankaanmexico.com/fifth_edition_character_sheet_app_warforgedrekz6.pdf
    • https://cdn.sqhk.co/bibobovezave/ihhhwii/37016783694.pdf
    • https://cdn.sqhk.co/sumexasov/jd5jfaj/pip_photo_editor_apkpure.pdf
    • http://videohost.space/noserulafesasegqit6i.pdf
    • https://cdn.sqhk.co/kixeworu/eioIMii/97253446307.pdf
    • https://cdn.sqhk.co/vibisidumes/hgiahix/jamutafixujivavaj.pdf
    • http://radanews.site/libigepatefeb3wdy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_fe628916c80b42a8b40c42b956ecbbda.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c9d96884-e7ea-4eb2-8ba3-f589d2a9773e/siniwudopunajo.pdf
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_d080ae5150cc4dadb28ab20742684fc2.pdf?index=true
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_f5fe2d3823d540bda7e89c5aad697f77.pdf?index=true
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_b31e46c711c74192854ded4e252042eb.pdf?index=true
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_eaff49227fdc47ddadd6f5254a09391c.pdf?index=true
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_1814f14dcd674c9783210ba7aa80736d.pdf?index=true
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_0ef2f9765bee455394edb9268f4a4baf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/50c781bf-b74c-4f58-95b8-d3ad6c12c23a/75880203821.pdf
    • https://uploads.strikinglycdn.com/files/a10bc681-3018-40b6-9cf0-d673968b79a4/gazedaradipidisej.pdf
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_d558bb70444f4da3bda0e745ecc492c7.pdf?index=true
    • https://cc0b58a5-7bf4-4b41-9cd7-d9bc0cd2cc6f.filesusr.com/ugd/6dc98b_1c7cf24a4b6646008221e982e7da4e16.pdf?index=true
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_daafd2ba793d495aaa63f9dffdf10887.pdf?index=true
    • https://uploads.strikinglycdn.com/files/20cca6a3-19fe-40d4-9119-b0103cf8e858/52394849480.pdf
    • https://uploads.strikinglycdn.com/files/0d4e514d-025a-447d-a899-db4dc5b14b4a/pigeguviwuvukidovava.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_off0000ec6e.bin
a01bae83142fdf12c9b506478bf1fed0cf96ac518bfcbe35d2c871741fc0594d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 5556 bytes
font_01_sfnt_off0000ff5b.bin
295a3a13d78965c86e5d4ba13cf4ca0b6ed576f1183ac37fd9b12ccafeddeb19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 10216 bytes

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