Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa86b1f65b1a3bd…

MALICIOUS

PDF

73.7 KB Created: 2021-03-15 08:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c96ed16cc7774052f18ffc08d50f60c0 SHA-1: 779489c1b11dcbd9a6d23168890248bf31e9d2cf SHA-256: 8fa86b1f65b1a3bd2604d635d1846f13fff59e872346c7ff5fc297b099de241f
96 Risk Score

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 high risk score. It contains an embedded URI pointing to 'https://zajinet.ru/wix?keyword=hand+crank+record+player+for+sale', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'hand crank record player for sale'. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests an attempt to redirect the user to a malicious site.

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://zajinet.ru/wix?keyword=hand+crank+record+player+for+sale
    • https://static.s123-cdn-static.com/uploads/4427799/normal_5ff2980733c72.pdf
    • https://cdn-cms.f-static.net/uploads/4464850/normal_601aaf2be2b7f.pdf
    • http://899themes-demo.ru/chopin_story_of_an_hour5frnt.pdf
    • https://sinonulu.weebly.com/uploads/1/3/4/6/134654736/8216711.pdf
    • http://zabavnyi-slon.ru/what_is_the_theme_of_a_poem_meanz3gqb.pdf
    • http://walletelectrum.buzz/fekoga3dxy3.pdf
    • https://cdn-cms.f-static.net/uploads/4410027/normal_60249d63276f2.pdf
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/bilasojuxin_suzumono_tigav_pebekava.pdf
    • http://frut-tree.site/77044353756ietj7.pdf
    • http://tibetterrier.ru/721745572127vf5o.pdf
    • https://pilinasovoda.weebly.com/uploads/1/3/4/1/134132167/lazitusopapipo_tapapap_duximadavim_xakomapuni.pdf
    • https://cdn-cms.f-static.net/uploads/4470837/normal_603aa889df3e2.pdf
    • http://salonop.xyz/dejelawililejak7bo0.pdf
    • http://instofficial.online/vinawujojivoxevesopbima.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/30e8ac02-5fb0-4fa1-bad0-e3a44e0f7483/short_multiple_intelligence_test.pdf
    • http://verirajoxa.epizy.com/bonfiglioli_riduttori_catalogo.pdf
    • https://uploads.strikinglycdn.com/files/813088d6-6c94-4b3e-ab34-ba2a390fbd8d/gabriels_inferno_book_4_summary.pdf
    • https://uploads.strikinglycdn.com/files/a588c64f-ad0b-42ec-bc98-285fc9b0d4c3/12331974136.pdf
    • https://uploads.strikinglycdn.com/files/5bf72e91-d5cc-4ce6-bfcd-aa15abe275e6/happy_tree_friends_lumpy_stuck_under_tree.pdf
    • https://uploads.strikinglycdn.com/files/eb9fe5da-0fd5-4f25-900b-e516b087f666/94603537459.pdf
    • http://fukoter.rf.gd/mosal.pdf
    • http://dakunexafabeve.epizy.com/6718848248.pdf
    • http://radujexoxetapil.epizy.com/stoichiometry_mole_to_mole_conversion_worksheet_answers.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e108.bin
6c431e34894394a438b5bc39b3ce25aff6695baacaf68e37b9a7d4b62088f367		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE108 5276 bytes
font_01_sfnt_off0000f31b.bin
c44c4070adcaee5b755d8bbfa0c4fde2c5e4d515917f380e84c2620073f5af04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 10956 bytes

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