Malicious PDF — malware analysis report

Static analysis result for SHA-256 804ee38c3fa03bd1…

MALICIOUS

PDF

88.2 KB Created: 2021-08-09 22:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 122abf7acfd1b1e94d275ab01c435ed5 SHA-1: 9206516d995b297b2227616034f67ac7a8a9ce51 SHA-256: 804ee38c3fa03bd100f2459c5b2439b7d608e487c4a4df217e6db76fd88c5d21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable domains. These links are likely intended to redirect users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/f108da624ace3e07ec1a4840da673f65/68436343681.pdf In PDF document text
    • http://gift-founder.com/archive/upload/files/dijekipiginemixafok.pdfIn PDF document text
    • http://www.celso.org/download/37022543961.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/muxajedeputiwaxizufaber.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/xokerogigakuzatukum.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da5418ade6---butitodejowob.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/c7f72b068288572d63be5fb87059dd2a/moxokovaxatebafunodul.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/9ae2cf5de8dac4046fd02773a971d0b5/89322499209.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/sezasowomo.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3328cb12e2d72cf4eea1d3f2f5bdce2d/dobabewanov.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/e08c54ebff071910da69f760915f02e8/82539725473.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/dudep.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/nebodijufogakumabiz.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/10646925777.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/jidazux.pdfIn PDF document text
    • http://linkipt.com/_UploadEditor/files/23917584094.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/0vfbi4c435fpt3g2k85cvdmsm5/88344632985.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/1cgf6pvburonu32s1rm7rogt52/xebivelogaxenazule.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/vugmgllr7bdaadv59qfaerkj05/tawepew.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/sidovowivizix.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/33882333439.pdfIn PDF document text
    • http://aimic.com/userfiles/file/rabegikuzagakuboxijifes.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/co7kdl7e5aq16t1ck0a9d20agv/mozuvemanolu.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/zudunewejis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=que+es+cuerpo+amarillo+en+ingl%C3%A9sPDF link annotation
    • 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_off0000efbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 18408 bytes
SHA-256: 21eae785729c6307f93eacde32037352991b968376e6edb357702f74768be9b4
font_02_sfnt_off00013708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13708 10932 bytes
SHA-256: 36ab413705271aeeca2ed782fe2e6427ccb0b1d5f1b76776459102b1799b7deb