Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1580463f7500ad1…

MALICIOUS

PDF

80.6 KB Created: 2021-08-15 00:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4768169de8e786cae76446ac9537e97f SHA-1: 9769d27a871f472b3c592821cfd179172d2ded5c SHA-256: f1580463f7500ad13c4812f14423b0001a44016dd5a8c95995d6732827467ad4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=benim+hocam+t%C3%BCrk%C3%A7e+soru+bankas%C4%B1+pdf+2020 PDF link annotation
    • http://folientastaturen.pl/_data/file/miwiguvavemeb.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/b96b03c25e5f0d4a5debb5753380f769/rilofakifegatek.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/filikefapipulidil.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/a76eee3d0b15e57fbb6a827da0935398/migekagizusakukafizasoxu.pdfIn PDF document text
    • http://cga82.com/admin/File/judanipamutiruranira.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/76318016242.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/punadur.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/dikalib.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a380faba064---62057147090.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607474054d817---xofokenalijiniloluzora.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/jinefojijopuritisapalumel.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/66521514300.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/gaxupibugiwojaxubafuka.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/t7o4rivu6qff59umpoc5emchq7/menojakezojujo.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/kegafexorureripape.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/48971178631.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/88724282783.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608816ea4502c---posevopuvonovekudebiz.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adfffcceca6---ginari.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/fewoko.pdfIn PDF document text
    • http://protok.pro/upload/files/moxebitukusa.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/nabonubajozinusereramakiz.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/mulun.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/84695369920.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/dovofagoxumofijuramusa.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D0 18000 bytes
SHA-256: 81d63d9b0507ac915bd28ec9f6e41517b5e255fc75399c2d3d2c9b70f87fccab
font_01_sfnt_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 11900 bytes
SHA-256: 22e9d0e0557ab0f2db10098ceb53a0cad29c9e595ef829f1a97759324f8030da
font_02_sfnt_off000119fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1