Malicious PDF — malware analysis report

Static analysis result for SHA-256 80497699e1f5e3ea…

MALICIOUS

PDF

75.1 KB Created: 2021-03-05 02:05:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1caa8dee1c37afc0c9af364931f7313b SHA-1: a205b229d08a8be7a4aa7cf1a7ca7b3ae203c388 SHA-256: 80497699e1f5e3eaf1699f6d49dbff1cd084cacf0ae7b414ae5161f0b7619509
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on potentially untrusted hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=best+us+history+topics+for+research+paper PDF link annotation
    • http://kernig.online/62015974094felvv.pdfIn PDF document text
    • https://jinuwipalo.weebly.com/uploads/1/3/5/3/135332432/8424016.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/8715613546.pdfIn PDF document text
    • http://lulilafemavivog.mygamesonline.org/tricare_south_region_referral.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/sesifojogilu.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/14415383975.pdfIn PDF document text
    • https://gukusuwinadeg.weebly.com/uploads/1/3/4/8/134880507/zusevewobiwaviket.pdfIn PDF document text
    • https://wanesutilujat.weebly.com/uploads/1/3/4/8/134868149/dagudowelemaz.pdfIn PDF document text
    • http://strongcreditscore.info/35378634280qfm7s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500438/normal_5ff28e9bd79b8.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/7.3_powerstroke_transmission_cooler_upgrade.pdfIn PDF document text
    • http://zathkatow.xyz/79903145534i07ob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420245/normal_5fc83c9cd1b79.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/laxemoxeje.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/cultures_of_the_west_a_history_volume_2_since_1350.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://funizenobuwuka.epizy.com/86033980133.pdfIn PDF document text
    • http://xaraxojiruf.epizy.com/gusegugijuxibetidutijesi.pdfIn PDF document text
    • http://xopemaw.rf.gd/irobot_braava_jet_m6_disposable_pads.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/boy_scouts_of_america_lawsuit_phone_number.pdfIn PDF document text
    • http://butevagowug.epizy.com/activesheet._protect_userinterfaceonly_true_password.pdfIn PDF document text
    • http://xomutojekes.myartsonline.com/fifty_shades_of_gray_songs_download_mp3.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/gufewanuvepuvofolevuw.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_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 5224 bytes
SHA-256: 749d4e166d7f1b77114e22c61fabf0377c4731df551b14ab3fc67a87c3bd57c7
font_01_sfnt_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 10016 bytes
SHA-256: 58c52b3d24760cbc018122f089f1b96c90ec9864e0d6c6cf4727ee3ebf0c503e

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