Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42aa3eb97947a54…

MALICIOUS

PDF

78.2 KB Created: 2021-03-19 18:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afc838d4ac070df1e3955e854f707c44 SHA-1: be0bdf9fb206a3c67ed91b7dfe394bd45b87a52f SHA-256: a42aa3eb97947a544516ea1df484764c23eb2a16a30eb357ab74610555bdb9eb
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that is disguised as a search result for a common query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/aws?utm_term=how+many+calories+are+in+bob+evans+sausage+links
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5fd1441102332.pdf
    • https://cdn.sqhk.co/tiwefuxab/HS3ijzb/tatorezumi.pdf
    • https://cdn-cms.f-static.net/uploads/4383156/normal_6028fec5a15e7.pdf
    • http://niwadeg.mywebcommunity.org/composicion_de_la_placa_bacteriana.pdf
    • https://cdn.sqhk.co/negolura/acicUDl/dowakogozekukara.pdf
    • https://cdn.sqhk.co/sewuvavimebi/eiajcih/tap_tap_fish_abyssrium_pole.pdf
    • http://terakusinuw.mypressonline.com/18444647152.pdf
    • http://finuxezanasa.mygamesonline.org/hamilton_beach_2_way_flexbrew_not_brewing.pdf
    • https://static.s123-cdn-static.com/uploads/4408863/normal_600590db9466f.pdf
    • https://cdn-cms.f-static.net/uploads/4414515/normal_602fa027b181d.pdf
    • http://sipamuxagiporen.iblogger.org/how_much_does_laundry_service_cost_on_holland_america.pdf
    • http://gatowixipeba.mywebcommunity.org/jarogudibilevesuso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nisetekotixob.myartsonline.com/passive_grammar_exercises.pdf
    • https://s3.amazonaws.com/gafedupeba/how_do_i_reset_a_ge_front_load_washer.pdf
    • https://s3.amazonaws.com/xixonu/bioorganic_medicinal_chemistry_letters_author_guidelines.pdf
    • http://zozinidusekoz.epizy.com/31815845087.pdf
    • https://uploads.strikinglycdn.com/files/5e5da534-3626-4964-b47a-5567a540e94f/valuvizuj.pdf
    • https://uploads.strikinglycdn.com/files/278eee3f-c302-4c2d-9d0f-a1b0d2c0a928/punekonumojikekalex.pdf
    • http://pifazudiso.rf.gd/74564874175.pdf
    • https://uploads.strikinglycdn.com/files/6328f0f6-d083-440d-b014-db0df75f05f5/waxoxopozudezexavek.pdf
    • https://s3.amazonaws.com/xutomoxu/45643849012.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e654.bin
58b5c2a0c4bb9a2db352ba93b8b7b0f8d38cdb353a19fc570f8ab89719aa1d03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE654 5340 bytes
font_01_sfnt_off0000f872.bin
a2d7db1f9441dcb830b33f3d74e6269763a1100889340dc2191e84db270df3a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF872 10680 bytes
font_02_sfnt_off00011d1e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1E 4324 bytes

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