Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd39ce5011e62115…

MALICIOUS

PDF

77.9 KB Created: 2021-04-02 16:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0458f00d5879646f810705db33486013 SHA-1: ed58c97f5f40a928cd62b44eca4ac4cfbeadcd18 SHA-256: cd39ce5011e62115d8e75e024e704deba92de867a4408f4527b5146242f681b5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://leonvi.ru/award?keyword=afro+latin+reader+pdf PDF link annotation
    • http://mazers.fun/tajekunemepoxebu8bdq6.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/f45kv6R/zitelogadipefemefif.pdfIn PDF document text
    • https://cdn.sqhk.co/baxafapunubi/9geJDn4/lazomavorugelopeso.pdfIn PDF document text
    • http://hairsprof.ru/aws_ec2_cli5ndl2.pdfIn PDF document text
    • http://kellys.space/making_inferences_worksheets_year_27pq78.pdfIn PDF document text
    • http://vuvefezod.iblogger.org/what_are_the_elements_of_religion_belief_system_and_spirituality.pdfIn PDF document text
    • http://pl50off.info/migezinudapabupijomefumwzb8j.pdfIn PDF document text
    • http://doporujela.iblogger.org/free_firefox_quantum_for_windows_10.pdfIn PDF document text
    • http://degitowexara.iblogger.org/dragon_ball_z_dokkan_battle_summon_guide.pdfIn PDF document text
    • http://firstdoctor.xyz/carboline_890_data_sheety7hyp.pdfIn PDF document text
    • http://creditscorefix.info/mowofekefubuysi0s.pdfIn PDF document text
    • http://clubstore.info/principles_of_instrumental_analysis_6th_edition_solutions_manualbit0r.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/hyJifhc/1001_games_gratuit.pdfIn PDF document text
    • http://istlan.space/61005311744awwg1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/gajilonux.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_561f4a55da5b423698b559af09b8dce3.pdf?index=trueIn PDF document text
    • http://gozudivigel.epizy.com/ib_biology_syllabus.pdfIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_55acd82ee84b4be9838b8d244211a0b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zopenave/baby_nursery_songs_video.pdfIn PDF document text
    • http://watibanawik.epizy.com/75379317797.pdfIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_e9990fda8f93482595bd372db8b66712.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 4848 bytes
SHA-256: 0efc7bd3efa98cc7ff946975897689f1286ffd1c5108c2e72d1b5c8f1464acfe
font_01_sfnt_off0001019e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019E 12104 bytes
SHA-256: 7e2fb75fe6bb7ed22dfd29b1270a589044878748f9c5d968986b6fa0667df635

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