Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdd92c4c3222ab3…

MALICIOUS

PDF

83.9 KB Created: 2021-03-15 08:42:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f30c3417defda552bb09ad20aefa275 SHA-1: f1ea7c092e518ea27c77a03bc1ce0d0bd4f3b9eb SHA-256: 5bdd92c4c3222ab3d3380297515c3911c4460c9f54a8dc6a8efe9a8cbdf1e5ce
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicative of a link farm or phishing attempt, with one URL specifically mentioning 'atomic structure bohr model worksheet' to disguise its malicious intent. The ML classifier and ClamAV detection strongly suggest malicious activity, likely related to phishing or malware distribution via the embedded links.

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://pelibifir.ru/wix?keyword=atomic+structure+bohr+model+worksheet
    • https://cdn-cms.f-static.net/uploads/4454048/normal_6009bc7b67919.pdf
    • https://soseriwu.weebly.com/uploads/1/3/4/8/134898980/jinuvetew-zuwumune-konaridibe.pdf
    • https://demomejisalazi.weebly.com/uploads/1/3/4/8/134869482/8432959.pdf
    • https://xinozujo.weebly.com/uploads/1/3/0/8/130874257/3ba2d163698.pdf
    • http://clientesdkb.com/guloresasituvjh4z.pdf
    • https://cdn-cms.f-static.net/uploads/4418993/normal_60111d96cbe5c.pdf
    • http://reduslimer.website/95362549718ndh15.pdf
    • http://lozhobelir.space/icebreaker_activities_for_meetings6jk7l.pdf
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/fusuvizage_tivukifono_dikikus_kogikofelodin.pdf
    • https://figuzenage.weebly.com/uploads/1/3/4/4/134472600/3710377.pdf
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/d055fdf.pdf
    • https://kufoxigokutef.weebly.com/uploads/1/3/1/8/131856815/aa79deda459.pdf
    • https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/665942.pdf
    • https://zuxoviwizazuma.weebly.com/uploads/1/3/4/7/134737549/bawazi.pdf
    • https://govewusig.weebly.com/uploads/1/3/0/9/130969429/mutoxi.pdf
    • http://uscovidcharts.com/90130559464r3bbu.pdf
    • https://static.s123-cdn-static.com/uploads/4415304/normal_5fc9ab505e67f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_a1061d7df05140b3be911edca7f68330.pdf?index=true
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_2693f24416cf4a16b776585514c24fa3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dca18ead-5d69-43fb-bb9c-6e42531d08b4/58934018261.pdf
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_2450fe202da149ebb38381b1aa0e43cb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/29d6dbe8-30e8-437e-8b5a-ade092eed38b/zoxatu.pdf
    • https://uploads.strikinglycdn.com/files/2d671af6-e257-40c4-8505-80389b4c6ff9/voodoo_lab_pedal_power_2_plus_brackets.pdf
    • https://uploads.strikinglycdn.com/files/be213d06-7e9e-496b-a06e-a725f3f1cbb7/how_to_insert_hearing_aid.pdf
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_1a1965074c234abfac1a67803c0f434b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ad5.bin
8989c8574689b621358e217cc2729bcb3773b75144295dc028ac8695356ada73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD5 5256 bytes
font_01_sfnt_off00011c99.bin
d304d63dadfdd8c8549968e90512933cf45a9db343f17fecc3e8e3b6a98ded33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C99 10908 bytes

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