Malicious PDF — malware analysis report

Static analysis result for SHA-256 7499c0eeac102973…

MALICIOUS

PDF

84.4 KB Created: 2021-03-31 09:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9357dd4e92d0081213eead3654a9aaa3 SHA-1: 8bc2460137a9f7b993658f126a85d4a19892b41f SHA-256: 7499c0eeac102973c56ba8b1b1ad9dfcfc464c1d09c7698f9fafac47018a6ed8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV both flagged this PDF as malicious, with ClamAV identifying it as a phishing trojan. The embedded URLs suggest the primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/wix?keyword=partes+del+periodico+digital
    • http://wegolurubakisud.22web.org/aaja_mahi_song_mr_jatt.pdf
    • https://static.s123-cdn-static.com/uploads/4426945/normal_600073c529407.pdf
    • https://cdn-cms.f-static.net/uploads/4369329/normal_6046a3477d65a.pdf
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/3175225.pdf
    • https://fedijukesubi.weebly.com/uploads/1/3/4/6/134600597/gitonufo.pdf
    • https://cdn-cms.f-static.net/uploads/4455894/normal_605facd724cde.pdf
    • https://cdn-cms.f-static.net/uploads/4369518/normal_604f140b5fdf5.pdf
    • https://cdn-cms.f-static.net/uploads/4474465/normal_60447411b59f6.pdf
    • http://perotaraze.22web.org/project_execution_plan_template.pdf
    • https://cdn-cms.f-static.net/uploads/4484122/normal_605efa0011424.pdf
    • http://dapodulasopo.iblogger.org/misunodavetezuj.pdf
    • https://cdn-cms.f-static.net/uploads/4405945/normal_6035ec9a1dccd.pdf
    • https://gowigejovijori.weebly.com/uploads/1/3/0/7/130740297/lixufivupiki.pdf
    • http://davizaxokekibe.iblogger.org/dramatic_irony_in_romeo_and_juliet_act_1_scene_2.pdf
    • https://cdn-cms.f-static.net/uploads/4463272/normal_605d96ea971d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_1ec8d22f2c934e019765cbd5f6eccbf4.pdf?index=true
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_0919aa3825d24384a91e3f75d22b4046.pdf?index=true
    • http://puzazodigeza.epizy.com/i_kissed_a_girl_sheet_music.pdf
    • http://ladisopezaxak.epizy.com/22659517577.pdf
    • http://lidiremuvuzanas.rf.gd/budofuxarodogevaka.pdf
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_613dac9f8b394e57857f2f2b2c11f261.pdf?index=true
    • http://giguvinelixegol.rf.gd/getunowosugabixus.pdf
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_c20beb82a9b64997aa06ba863893cbfb.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_off0000f2e8.bin
518b25e8aaba686a93cbbfbd79c5a837d293973dcad2afc694440234e9ca4ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E8 5244 bytes
font_01_sfnt_off000104ca.bin
58b4a4cc997f25cc8e9dccd2baa2a0fd77d1868bde2ce465b7836692b64d1385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 12412 bytes
font_02_sfnt_off00012d49.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D49 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.