Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fc32f7c20d4829…

MALICIOUS

PDF

82.6 KB Created: 2021-09-04 00:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d46c2e56b8050c6804020b95f839c209 SHA-1: fd252b7f3d433d1167c29a32bf970273a5e2820b SHA-256: 27fc32f7c20d4829be382dc16961a37553cc0e554c7c446160a0563a11c79b45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The file's purpose appears to be directing users to these external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pixomot.ru/uplcv?utm_term=ingersoll+rand+t10+air+compressor+manual PDF link annotation
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160adfdef526d2---dasusifakileselilu.pdfIn PDF document text
    • http://uci.ir/userfiles/file/68813617053.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8b66d6987b---takadatupejuwidibuma.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/182757753.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c074b4a0dc0---botogaponopafuwepafinotib.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/sorotu.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/jinenom.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/fijudakagow.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/43757266896.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/niwavagaxaxobamefi.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/zogovodunevuxadipojisubo.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd53c5b77ba---pikuvaxepenotukov.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/kulogobovixonokulis.pdfIn PDF document text
    • http://bertolinacare.it/file/gofufoguxunula.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/76732893406.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/ditabazotamakeporati.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/abdmaapjhi6e5au7ho2n4ud425/felusi.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/sigewaboderut.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd83ced4c81---99224172958.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d81f0cc11---91659693449.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/fovosatepomigapikem.pdfIn PDF document text
    • http://cycling-software.com/files/file/20413733681.pdfIn PDF document text
    • http://vinadesigndanang.vn/uploads/image/files/taminivomipaziwaxuter.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_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 17896 bytes
SHA-256: 1cd83f1c03c6aed94ccaad888089a3c2045f7afe3dd3746a5d88d85af9b314ab
font_01_sfnt_off00010b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001232c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232C 11084 bytes
SHA-256: 765e9bd1277fb2cd6b56533eb90377f69064e89ebfcf944884735e0ea719fa64

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