Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc8ec278f710113…

MALICIOUS

PDF

79.3 KB Created: 2021-04-03 08:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dd3b9e57b45f431e0765d60b3e440b45 SHA-1: d9489432cdf4962549bd9e9ce11455792308b02b SHA-256: 0fc8ec278f710113c412ef3efd5de45d2ff484b2a0dc59e3559a182ba18f16b4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to citation reports, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://xezojetit.ru/123?utm_term=journal+citation+report+2019+impact+factor+2018 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392647/normal_600474d649290.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5fc775b05c8cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461219/normal_6051b8d5eb898.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409621/normal_5fe423b21dd16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_6047170dd6c93.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/haQicie/toxosopokit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5fda64d643ad8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480397/normal_605f5a441d052.pdfIn PDF document text
    • http://worldhold.online/asterix_el_galo_descargara67dt.pdfIn PDF document text
    • http://ita-fitness.fun/how_much_oil_does_a_onan_4000_generator_take4c9rg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_603132bc41e40.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/rugfhaS/98830464061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481156/normal_60226be17df7f.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/ctyhihi/top_programming_languages_to_learn_in_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/WPbghoZ/xawegimegegunafetenivemod.pdfIn PDF document text
    • https://cdn.sqhk.co/kupemopo/hqjhAih/xudexasulagexorutegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_6035bb73a3eb1.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/72e4c08e-cf0a-47af-82ba-f89b621f703c/computer_hardware_parts_store_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e2390c-8123-4ae6-9737-e3c9b169d63e/22803941064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37eadabd-9385-42c4-a83c-e90569b76630/data_analytics_jobs_near_me_entry_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074dad50-2114-442d-8418-46ffb36274ba/64157288676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479993c5-19b7-475a-b232-fc9814fb2224/52671223670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62ef108-b887-4995-916c-de9cf866d2fa/fujifilm_finepix_s8630_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199cbc04-5210-4ce5-9c0b-c2ac30c3cba2/zugipamojajurafux.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_off0000f5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F1 5648 bytes
SHA-256: 79ec8bd9652c01e52f3922dc7ac3cafe0e03667b4d662a331efa0fa14969fcdd
font_01_sfnt_off0001091c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091C 11192 bytes
SHA-256: e204b6438d08770b0edfc560a43f70ecf3e57f3cdda94356f54e1fadfc30af1e

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