Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7ec4ed528d2eed…

MALICIOUS

PDF

91.3 KB Created: 2021-08-06 18:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 224517f327653a6d5e412b9cc58a70af SHA-1: 02b4128b16f17530cca65da54d75d5f368e7b6eb SHA-256: 5c7ec4ed528d2eedcde61e74c590277da5b1ffc6d315b803f6ee27098c286b53
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress sites, suggesting it's used to distribute further malicious content or phish users. The presence of embedded URLs and the heuristic for a 'Callback phishing phone lure' further support a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b7e989de9---xobimigapogozuwu.pdf In PDF document text
    • http://angelcabrera.com/FCKfiles/file/bonid.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/tijotuwesosi.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/62287347292.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/52avrj11cscg8mbukbmnfdrqa4/modipufazuta.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/5aipg0iv80tbtfsnm1gom6phm5/tadetujikabubimam.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qrctcfeptsp8t1u8u5b8lkccb0/1809161772.pdfIn PDF document text
    • http://www.polni.si/Images/files/51952606753.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/zitagizarakadenapu.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/bd7b5745a1e9b94ac2d5df2e5270cb83/mudesuvorozoxabunax.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cf753a382---ruwasugezekunawi.pdfIn PDF document text
    • http://djapm.com/userfiles/file/58901412740.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/wizawokujipojeruzosanek.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/73385149221.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/57097753343.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b232b4e4c5a---26814177438.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f25ee8d80---10169325344.pdfIn PDF document text
    • http://artside.org/data/temp/file/36174324117.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/3422472636.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/f743a2c8d316e71c67caad2a119879c5/zepefizapitolufobol.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/binisetufumajuramuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=madness+combat+project+nexus+game+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE816 11316 bytes
SHA-256: aad10cc04341b74161b85c4cc794fcc2407b69e7325153c79324ecf8062e9807
font_01_sfnt_off00010251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10251 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_02_sfnt_off000117c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD9 17380 bytes
SHA-256: 2467fdc840e6f42fa5461b1883fc2106d8d28a6af06383699c16030964863868

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