Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33372fea836706a…

MALICIOUS

PDF

74.3 KB Created: 2021-03-27 17:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2209a4bae5c99ea262b841ecde59946f SHA-1: c31e555ff77368b6434b318dda7b41b5e67f33b9 SHA-256: a33372fea836706ab2ed39acf95e840b8a63e47285786f139e4f64d1fb9d66be
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, and a ML classifier and ClamAV both flagged it as malicious. The embedded URL `https://ponafet.ru/award?keyword=scope+of+work+construction+pdf` is likely the intended destination for the user, disguised as a construction scope of work document. No scripts were extracted, but the overall structure and URL suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/award?keyword=scope+of+work+construction+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387417/normal_60186ae0a0e63.pdfIn PDF document text
    • http://soxiwokix.iblogger.org/2gig_gc2_master_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388163/normal_5ff8b0d5d7204.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/gulogofubemabimodu.pdfIn PDF document text
    • http://torixobo.mypressonline.com/c_async_await_tutorial.pdfIn PDF document text
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/1629043.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/592ca0ac8b2b993.pdfIn PDF document text
    • https://lokesikaneweb.weebly.com/uploads/1/3/1/4/131437695/faguwemukub.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/integral_calculus_joseph_edwards.pdfIn PDF document text
    • http://gonimuliveza.22web.org/9th_class_biology_notes_download.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/nafoxuda/bksblive_english_assessment_answers.pdfIn PDF document text
    • http://jofikuv.atwebpages.com/reacciones_alcanos.pdfIn PDF document text
    • http://vuxifonodine.epizy.com/5441553339.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/charsequence_android_strings.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/87329304876.pdfIn PDF document text
    • http://dujisuga.epizy.com/english_grammar_printable_worksheets_for_grade_8.pdfIn PDF document text
    • http://vomematomeze.epizy.com/bcs_theory_short_notes.pdfIn PDF document text
    • http://kuwoguki.epizy.com/android_studio_google_maps_api_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/how_does_the_first_cell_form.pdfIn PDF document text
    • http://kabumosubeno.epizy.com/83824213598.pdfIn PDF document text
    • http://limekukojaso.epizy.com/bezutalazivo.pdfIn PDF document text
    • http://xakizeko.epizy.com/fafizajin.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/95676087257.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/executioner_meaning_in_english_urdu.pdfIn 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_off0000e4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C7 5168 bytes
SHA-256: 1060b5b029d24cb11b8a242c17e335c6a0e7f0d55819e2f337a216c2bfb9724c
font_01_sfnt_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 10532 bytes
SHA-256: 1fc290da5facd92d71778da30284ff909532bdceec96f171865d6b6c0af91c15

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