Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ad17b08ca686ee…

MALICIOUS

PDF

87.4 KB Created: 2021-05-03 07:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00db1e4d73af8ae7212e40c8649ac423 SHA-1: 04ef4637fa2240073569fc2413af7942ccb66dbb SHA-256: 98ad17b08ca686eee1b1c46018065069bcbbda43a304da6ee2566e54349f3da5
156 Risk Score

Malware Insights

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

The file is a PDF containing a large number of external links, identified as a PDF link farm. Several of these links point to potentially malicious domains, suggesting an attempt to redirect users to phishing or malware-hosting sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/strik?utm_term=pioneer+avic-5100nex+backup+camera
    • http://nibakelenixezas.getenjoyment.net/how_to_reset_whirlpool_duet_dryer_f01.pdf
    • https://cdn-cms.f-static.net/uploads/4466172/normal_60129a2870211.pdf
    • https://cdn-cms.f-static.net/uploads/4456391/normal_601cf199b01bf.pdf
    • http://buwovavozu.getenjoyment.net/jalusedidewiworag.pdf
    • http://najetaxu.mygamesonline.org/bsc_1_year_syllabus_2020.pdf
    • http://rejorevubirobu.sportsontheweb.net/70603337509.pdf
    • https://static.s123-cdn-static.com/uploads/4383322/normal_5fdec6cf4465a.pdf
    • https://cdn-cms.f-static.net/uploads/4463824/normal_601992af004f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zerepuzuze/botunevivelaxufilaf.pdf
    • https://2cfcb734-ec62-4cd9-b61c-03d4762ad765.filesusr.com/ugd/a891c0_fa95b0b52f7f47d99b2ed4a84247ea2d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/70eee980-bbde-4e7c-8cbd-e0dc3a7c42c1/how_to_fill_project_management_experience_for_pmp.pdf
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_7af5cd60077a4e9989743794a7e6e7b2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/659905cb-b3a4-4305-b300-1793cd963717/20737832774.pdf
    • https://uploads.strikinglycdn.com/files/4e477ff6-9da2-46bc-a794-b00647094548/jofizekopurexupifesaz.pdf
    • https://uploads.strikinglycdn.com/files/c07d9675-9bf6-45d2-a8e9-e9b628740ca9/knex_manuals.pdf
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_9360157e38674cf4bbaee43e4eda2aef.pdf?index=true
    • https://s3.amazonaws.com/banula/xirujuxigugikuduwe.pdf
    • https://764dfaed-7091-4b1c-a8ff-ceb5b694923f.filesusr.com/ugd/4bafdb_8a6e381411f04a8781481012220c604a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eb827e10-5754-4fde-8ddd-fd267dfcc0bd/hamilton_beach_18_quart_roaster_oven.pdf
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_cb0e4857306e413cb39838820b4ec93c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000134d5.bin
03648f1af00672e4ca4b5503bdf6e29b0bca16b40ae577153b24946d2cdedd97		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x134D5 17808 bytes
font_00_sfnt_off0000fa10.bin
bb683b388557d244688d54dfa06934c3786b45d29b9a7e06c039feae7c05c913		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA10 5552 bytes
font_01_sfnt_off00010cf4.bin
40382613ca35c78e5a10576697a6cdaa682fae81824b89a7c611ceabdd90c2f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF4 11700 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.