Malicious PDF — malware analysis report

Static analysis result for SHA-256 26508f3148153a7a…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 09:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d49327530346f3686b495e2ad028ab5e SHA-1: 9983c5051f8af7236f8eada8fed522e5904a29f9 SHA-256: 26508f3148153a7a461db7922408875aadf8839f53648015b90fb5ac14baf46c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to domains commonly used for hosting malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/wix?keyword=chapter+12+molecular+genetics+study+guide+answers
    • https://forupiwiwipugo.weebly.com/uploads/1/3/5/3/135349306/f5e08c204db978.pdf
    • https://zezazerin.weebly.com/uploads/1/3/1/8/131856191/luxerolo-zurufezamaxozo.pdf
    • http://tovelksa.website/cheats_for_gta_v1b3ps.pdf
    • http://fuvunopulo.22web.org/puzzle_bobble_psx_iso.pdf
    • https://xunuvetokogira.weebly.com/uploads/1/3/1/3/131384336/483051.pdf
    • http://davegopodowog.iblogger.org/fuzepo.pdf
    • http://coupons2020.info/what_is_niv_thinline_biblem8x6v.pdf
    • http://soldonlittleton.com/german_texts_for_beginnerskzxd0.pdf
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/2498b4c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_fba01975751d4438a457d6794c15d7bb.pdf?index=true
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_c627ed10568141e09e34f8d6adf1cea6.pdf?index=true
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_7be4436b468c4259a37cb76d9a5e5d9a.pdf?index=true
    • http://nirobow.epizy.com/pipetenidib.pdf
    • http://nidolivudazos.rf.gd/cutting_practice_worksheets.pdf
    • http://redubemupaluk.rf.gd/craftsman_lawn_mower_parts_list.pdf
    • http://kuxomexepus.epizy.com/lugivazib.pdf
    • http://vebavibokifoko.epizy.com/zojirushi_ns-zcc10_jasmine_rice.pdf
    • http://tuzuzefu.rf.gd/bollywood_songs_2017_mp4.pdf
    • https://8acf0fc4-2da8-4686-9788-d7840b5449fc.filesusr.com/ugd/fab691_c263b3cf6c4849c3bd473f107cd2e347.pdf?index=true
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_b1f43ed586964b439228928eb0d4795d.pdf?index=true
    • http://dokivux.epizy.com/arduino_mega_2560_pinout_spi.pdf
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_891d45f4cea7446dae740747945e7d56.pdf?index=true
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_400bf26bcf954eb0b53038a27ebff403.pdf?index=true
    • http://wufejupixixot.epizy.com/clinical_pharmacology_jobs_san_diego.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f7.bin
b8f74ad62133a805ff7c2e30dc7852ae346c54ae60c5b67721ef5d7f508f60a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 5768 bytes
font_01_sfnt_off0000fc8f.bin
cf7c759ee11129435292c2b5621f11d68695be8b39eeb63d7e3b5ea4d32bd09a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8F 12908 bytes
font_02_sfnt_off000125df.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125DF 4324 bytes

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