Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaddb0bdb45fd0fb…

MALICIOUS

PDF

74.5 KB Created: 2021-03-14 12:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e8d82d293539942d8bcc85b10d83663 SHA-1: d0f142ce5229f56cc8595516580a1315b7308e4e SHA-256: aaddb0bdb45fd0fb000fe7919ff1a3bba40c6254807157a781082fd333d97aa2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URIs, 'https://lozipotod.ru/wix?keyword=anatomy+module+4+study+guide', is flagged as suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery through the embedded links.

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://lozipotod.ru/wix?keyword=anatomy+module+4+study+guide
    • https://rosunitekuw.weebly.com/uploads/1/3/1/3/131384708/ff276.pdf
    • https://cdn-cms.f-static.net/uploads/4452839/normal_601b617f63c53.pdf
    • https://taxikifa.weebly.com/uploads/1/3/4/4/134496463/jezuxil-terivadawidelez-nasemeki-mizabibafed.pdf
    • https://cdn-cms.f-static.net/uploads/4474176/normal_6034c4f8050ca.pdf
    • https://cdn-cms.f-static.net/uploads/4409113/normal_5fdc88550d22a.pdf
    • http://fusubakitakudup.66ghz.com/libro_el_secreto_ley_de_la_atraccion.pdf
    • https://zisefedid.weebly.com/uploads/1/3/4/7/134767142/jekolowevipages_biguwezabema.pdf
    • http://jadelurapesa.22web.org/32880941325.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fasomusogapovi/57590345169.pdf
    • https://s3.amazonaws.com/sugowubuf/wepodoxewibuti.pdf
    • https://s3.amazonaws.com/fifomi/bookkeeping_template_printable.pdf
    • https://s3.amazonaws.com/jenisozazewubo/7_steps_of_service_restaurant.pdf
    • https://s3.amazonaws.com/rilexazejuzovep/71972262545.pdf
    • https://s3.amazonaws.com/forupokisip/nitoditevufaw.pdf
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_b3756e40c8aa47458ebd4b716991ea2a.pdf?index=true
    • http://tifuponakeg.epizy.com/lg_front_load_washer_problems_oe_error_code.pdf
    • https://s3.amazonaws.com/fidefofudi/smadav_2014_antivirus_free_for_pc.pdf
    • http://nipizil.epizy.com/relative_age_dating_activity_worksheet_answers.pdf
    • https://s3.amazonaws.com/guvovigo/3_point_likert_scale_template.pdf
    • http://tonupizi.rf.gd/rojonufegevifonogosaj.pdf
    • https://s3.amazonaws.com/sepawi/47913749443.pdf
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_26c20d339d7347ca9e5ca164b89d3021.pdf?index=true
    • https://s3.amazonaws.com/temujonuwu/is_333_in_the_bible.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_off0000e59a.bin
75fd79a75b81f52b702c62de65db74e880a5faf977088986eb4101ad23de86f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE59A 5228 bytes
font_01_sfnt_off0000f768.bin
8c4eb664adc6c3b3b99265d6868da5fdcdc011aa05b4ca060cc4f7f8b9375624		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 10892 bytes

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