Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec2a0bcd145431e…

MALICIOUS

PDF

92.4 KB Created: 2021-06-30 00:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c2190e78ca34618b9a2f7eb377a2f600 SHA-1: 480f463106137e29901d1424e880ac95799c2e18 SHA-256: 0ec2a0bcd145431e68096cd74122e1bece0ef2eb80f0af2270bc8716aebac5b7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, which in turn host other PDFs. This structure suggests a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/0diq0i4o74tb76osrr9i3i5oq7/togapij.pdf In PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5c404724dc6840a5cd48fda014856c08/sivimelobodefusagudolov.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcecaec32b---zagexomumirapipen.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/361b1d8e72d0dd73b3421e5eb44e72a4/kipuvamuripofibaliz.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/e29838fa470ccbcac1a0d440c75afa94/joranukow.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/sofabatinibaramatumat.pdfIn PDF document text
    • https://premium-house.uz/images/file/ratisuxipu.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/dcf6bb2ba02fbbd8941143bf2ac8f2b2/60709494707.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e64a1c880---3116029352.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/63ot23fbvkem7kj9oh2gj5bkl5/zasewuxokojuvetemajidi.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/mazuvolesuniv.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/zenoluviwonamatibuvijux.pdfIn PDF document text
    • https://kildevangen.dk/files/55722174721.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/vazefikujupaluxitiviki.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acaf175aef5---59248406307.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/zatixoxomunoguninamawan.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/5763d699ff5ffa2d9113f65371c7e121/95646738012.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/hren5bf0dso8o1tme7iedug0um/soferugezufawi.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/20659963529.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b120fcdb734---28829006834.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609904c6e0ef0---bajibewapidobenas.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/8048e151672fe80cb4e78391e0aed2e7/bumavigofos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=st+barbara%27s+cathedralPDF 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_off00010631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E43 18000 bytes
SHA-256: 694e153a6bea70ed5bc9d1db0b2b7201c2acd12087bf00c901b68f20d30136ef
font_02_sfnt_off00014cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD0 10400 bytes
SHA-256: 79e74e495c1057ee786d776edd675e8266921b419f233d4ce51a64a028c4df23

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