Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff837c1b0db56a7…

MALICIOUS

PDF

152.0 KB Created: 2021-05-19 13:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11e9f8374226a854e65961dd3baf7845 SHA-1: 7542e8306238d605b7b46b726ce7e340e851f94d SHA-256: 5ff837c1b0db56a70e7efeb1540f4e07d95f789cadd5324bab5dd901bb57d2f6
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with a primary suspicious URL pointing to `jumiwimov.ru`. The PDF structure suggests it functions as a link farm, likely intended to redirect users to malicious sites for phishing or malware delivery. No scripts were extracted, but the presence of numerous external URIs and the overall detection profile strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=%25D9%2585%25D8%25A7+%25D9%2585%25D8%25B9%25D9%2586%25D9%2589+%25D8%25A7%25D8%25B3%25D9%2585+%25D8%25AF%25D8%25B1%25D9%258A%25D8%25AF PDF link annotation
    • https://topejaliwas.weebly.com/uploads/1/3/4/3/134305960/69c5e536.pdfIn PDF document text
    • https://diwuxofemuji.weebly.com/uploads/1/3/1/4/131407179/dujapikuz-rovitagi-xojeba.pdfIn PDF document text
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/xuwudeloruf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529893/normal_5ff3e7b1ae428.pdfIn PDF document text
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/radaru_wokozikerevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485705/normal_6059490a1e466.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5ffd9e6080b7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530910/normal_6000873684d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451544/normal_6059021e6ce4c.pdfIn PDF document text
    • https://figokafudifugi.weebly.com/uploads/1/3/1/3/131383964/a9d1e68af1.pdfIn PDF document text
    • https://zajinepimasi.weebly.com/uploads/1/3/2/8/132815118/cbcd1c55e4e2.pdfIn PDF document text
    • https://fifubinagate.weebly.com/uploads/1/3/4/8/134854053/3690165.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452621/normal_5ff0d6a7581d2.pdfIn PDF document text
    • https://dapalirodo.weebly.com/uploads/1/3/1/4/131483520/jujuzelufegulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_60450b885c58c.pdfIn PDF document text
    • https://koniwosusuzese.weebly.com/uploads/1/3/1/8/131856176/6663461.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6a7b8d-dd43-4469-bc91-e23dc0051515/zopunes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef592dc7-7f11-4f6d-aa47-6dc7e0fb2456/about_roland_barthes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adaf73ca-39ba-4ee1-8f07-5a74618938c4/lewixubup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4658f70b-7762-4554-8b50-e7ad4e397373/dell_c1765nfw_printer_wifi_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02e9c26-c9cf-4713-b36e-70d83ca41fcb/midnight_sister_souljah_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58a3978-d4db-481e-abb0-eb795da58838/anatomy_for_the_artist_sarah_simblet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde0a1c9-73f1-48bf-99b3-fa09e866ba19/grammaire_franaise_niveau_universitaire.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000214ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x214CA 34156 bytes
SHA-256: d2888fb074cf1f0c25e59cfaa3b95a4433a98f8d32f1824810220765268e2960
font_00_sfnt_off0001cb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB3F 4068 bytes
SHA-256: 60a2d6429503f7a4ddaf98851b2b9757a5da54dd45bab0a2aed837b7042708be
font_01_sfnt_off0001d91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D91E 9944 bytes
SHA-256: 129a166d47674e9f6d8dff48fc6cc8e749d29389ae49e297099b2806ff8f85dd
font_02_sfnt_off0001fb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB00 17356 bytes
SHA-256: a7866a64ac2e8ae8ec4a9760d6d38b8e0d8c4b133749cf6bdf45a3b6acef4a87