Malicious PDF — malware analysis report

Static analysis result for SHA-256 039499fff51510e2…

MALICIOUS

PDF

80.7 KB Created: 2021-04-01 15:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cd7b9590a0869c2542c9cb3ba0722c4c SHA-1: 92f4024b08c4c6cb4f923c1fc0daf3625e43a5b1 SHA-256: 039499fff51510e29bd265a4de2b515bfb57c95f5037728d6c550291589fb5da
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to "Cass county sheriff warrants", suggesting a phishing or social engineering lure to drive traffic to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://jumiwimov.ru/wix?keyword=cass+county+sheriff+warrants PDF link annotation
    • https://cdn.sqhk.co/pixazizaze/gjjibia/space_rangers_hd_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/jgRhahh/piano_keys_chart_blank.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_6054b1e75cdf8.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/idieghR/stadia_free_games_november.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_600a9de03c725.pdfIn PDF document text
    • https://cdn.sqhk.co/tozerutiwezu/2Wiigi5/fopurufedogovuxizi.pdfIn PDF document text
    • https://cdn.sqhk.co/sozimelizak/m47ibAB/1412078248.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/jghj2ha/sakubuduruwesesovawidake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_605508eba142c.pdfIn PDF document text
    • https://cdn.sqhk.co/migukosodaza/Qibjdjb/10930940603.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/NCghhjN/among_us_unblocked_games_77.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/LgiAmBt/t_mobile_syncup_drive_2_plans.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448103/normal_605cb9c949482.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/6hjihb7/dimabitinitugefen.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/ij7gCQe/sikowidamifozubasemup.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/ihivehf/runibedurumufalaruwaz.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/jjyhjjf/communication_interpersonal_skills.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fibesezati/tao_te_ching_what_is_it.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/absolutely_anything_movie_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe29bc9-71a7-42c2-a737-68cf73ba0898/ecotech_vortech_mp10_modes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee7ffdf6-260e-4ce5-85c3-66289ac7d698/what_is_english_101_like_in_college.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482c7e58-c808-42f3-a73f-bdd5e8dbb2c9/how_do_you_charge_a_playstation_3_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/81014330439.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/wow_classic_hunter_talent_tree_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/lotasipavovevogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa675364-21d4-4e3a-aa2f-554358efeb30/26795392077.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF77 5036 bytes
SHA-256: 75aeb5593116aed7e675c35174d2ab7cd888e1acad25616e27b82988f0df1492
font_01_sfnt_off000100a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 11212 bytes
SHA-256: a61fb4a15b4b1452a01f3db7426f27da749479324ce15cefa327d05589fb4759
font_02_sfnt_off000126f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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