Malicious PDF — malware analysis report

Static analysis result for SHA-256 07507ba79b293579…

MALICIOUS

PDF

84.3 KB Created: 2021-03-28 08:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2a6c6d8288df2afd7f07fb7f4abadcef SHA-1: 1be4c1e96579ece3954c930f60c26cac9f61de9f SHA-256: 07507ba79b293579d6694ab63375d7aeeb1ecb1bf8cccfad5cc289386cc536df
186 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 large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The primary external URL, https://jumiwimov.ru/award?keyword=el+universo+de+las+energias+renovables+pdf, is likely part of this scheme to drive traffic or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=el+universo+de+las+energias+renovables+pdf PDF link annotation
    • https://cdn.sqhk.co/josipinu/icia1xL/34021414875.pdfIn PDF document text
    • https://puxinatax.weebly.com/uploads/1/3/5/2/135295704/wixejawo_fajura_losutamefa.pdfIn PDF document text
    • https://towelekuw.weebly.com/uploads/1/3/1/4/131406253/4274018.pdfIn PDF document text
    • http://narezekopalezi.iblogger.org/pekotebekesuzidiwidu.pdfIn PDF document text
    • https://cdn.sqhk.co/zesojesiwi/jTemigu/teddi_mellencamp_husband_ethnicity.pdfIn PDF document text
    • https://bevereka.weebly.com/uploads/1/3/0/7/130739533/nafipewevaberejafu.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/70603337509.pdfIn PDF document text
    • http://jefuvumerusew.getenjoyment.net/historia_de_los_aditivos_alimentarios.pdfIn PDF document text
    • https://nojemalof.weebly.com/uploads/1/3/0/8/130873850/727af186.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/EIjdupS/nexedovegemo.pdfIn PDF document text
    • https://cdn.sqhk.co/bazexolareja/5cmjogi/how_much_are_wedding_cakes_at_walmart.pdfIn PDF document text
    • https://xiwupezarevapo.weebly.com/uploads/1/3/2/6/132681984/4378059.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6ae5a9c1-8526-45f7-b068-03ddf2465b28.filesusr.com/ugd/87f732_477f8f44983147b9ae588195ebb3f8f8.pdf?index=trueIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_9806c80d29154fe9a3e7639200e87006.pdf?index=trueIn PDF document text
    • http://dusexodabedokak.rf.gd/singer_futura_2010_sewing_machine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac534274-b9db-4f97-91bb-d71169946c34/zotonerofotuwiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/873e12a8-b781-488b-9e6f-a6e96f1d4adb/95937240919.pdfIn PDF document text
    • http://vudolazer.rf.gd/kelobakelawajimikitopig.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/how_much_does_sub_zero_fridge_cost.pdfIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_670633238b4e4ff1aef721e9e44af84b.pdf?index=trueIn PDF document text
    • http://bolirazebaf.myartsonline.com/customary_law_in_zambia.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A49 5368 bytes
SHA-256: de511b49db25e4c697a41f2cbff4ae7372fe3ec7cf642ca2542e5266bb4f6754
font_01_sfnt_off00011c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9D 11688 bytes
SHA-256: 6703ced9bcc3e9389f8012824c2df1d75fd47c48c4c427f6dd423a22ee84ced2