Malicious PDF — malware analysis report

Static analysis result for SHA-256 269228095ffdffca…

MALICIOUS

PDF

88.2 KB Created: 2021-04-06 22:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c8c28bc1eb7394ca0dda884283cf963 SHA-1: b38d89f27888393058a5bcfef6b4871db34beeeb SHA-256: 269228095ffdffcaa2380b825e84f1624947ad2ea4c3e16a229a42b60d298c87
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains keywords related to a 'Troy bilt horse log splitter attachment for sale', likely a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=troy+bilt+horse+log+splitter+attachment+for+sale
    • http://igme.site/arealme_english_test_answersv2fgu.pdf
    • http://pexarinolal.mypressonline.com/nitusuwatofabikivisises.pdf
    • https://wibalavutuvej.weebly.com/uploads/1/3/4/5/134527261/3766644.pdf
    • https://dusaxufar.weebly.com/uploads/1/3/5/3/135327992/fidivefo-rumikim-limilenejekoxeb-sokidedapo.pdf
    • https://vuzowukuz.weebly.com/uploads/1/3/0/8/130814197/447136.pdf
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/5599298.pdf
    • http://mukuwasoveta.sportsontheweb.net/boulevard_of_broken_dreams_chords.pdf
    • http://vizazovabula.mywebcommunity.org/english_phonemes_chart.pdf
    • http://nulatapukedu.scienceontheweb.net/acute_bilirubin_encephalopathy.pdf
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/xenorixazipenof.pdf
    • http://reflectionss.space/mindfulness_based_relapse_preventionx0t3q.pdf
    • https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/948507.pdf
    • http://jukojadijomefar.medianewsonline.com/ambaji_aarti_free_download_in_gujarati_free_download.pdf
    • http://femuxeririta.mygamesonline.org/rangers_apprentice_second_book.pdf
    • http://pedrons.space/sulifujn5x79.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jefazaxal/cisco_umbrella_professional_ordering_guide.pdf
    • http://desovizipelo.onlinewebshop.net/39881382417.pdf
    • http://xadilopavut.myartsonline.com/86482830769.pdf
    • https://s3.amazonaws.com/bisegilupuf/hannah_arendt_the_human_condition_quotes.pdf
    • https://s3.amazonaws.com/gixirojozogufux/junevetaxuxuv.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_off0001177d.bin
a534643f22c77462fc6cc162b432be8a8e0597059a3dce7427f94f7a5c50911b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1177D 5620 bytes
font_01_sfnt_off00012a76.bin
8b87bdd08e5d9cd9fe6bed98fec52554781c4ea50c533387ef493c02582472ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A76 11396 bytes

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