Malicious PDF — malware analysis report

Static analysis result for SHA-256 0084be7b2cdd3581…

MALICIOUS

PDF

80.3 KB Created: 2021-04-03 16:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4853a4b9b4f9d4289d1686892e8deb7a SHA-1: 4ed81ffdb40db847ecc4938f7599a2d1524f5c00 SHA-256: 0084be7b2cdd35817879ab0c1f673b4255a3325a30bd5b088d2f9782704d5d28
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'Ipod nano 2nd gen instructions', which is likely a pretext to drive users to the malicious URL for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=ipod+nano+2nd+gen+instructions PDF link annotation
    • http://xtreme-sport.ru/gordon_ramsay_100_recipes_to_stake_your_life_on_downloadxs4tm.pdfIn PDF document text
    • http://esclub.pro/g_shock_multiband_6_tough_solar_priceqow4m.pdfIn PDF document text
    • http://ionatr.fun/express_the_graph_of_solution_set_into_interval_notation_brainlytgmwh.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/jaeger_lecoultre_atmos_clock_repair_manual.pdfIn PDF document text
    • http://sosed.market/how_much_time_do_you_need_to_train_for_a_half_ironmanbihjf.pdfIn PDF document text
    • http://kasyanbeauty.com/how_can_i_strengthen_my_babys_neck46eb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471092/normal_604f73a82e0f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412161/normal_605b727473048.pdfIn PDF document text
    • http://rorogudadusosej.getenjoyment.net/44160226856.pdfIn PDF document text
    • http://digitalcalakk1.xyz/calendario_2020_escolar_20-21_sepa0czh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_601531ff3e15e.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/punagilelabon/61312147293.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/dressmaker_sewing_machine_manual_free.pdfIn PDF document text
    • http://vamanufa.rf.gd/cells_r_us_project.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/682854996.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/kexusikaditifu.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/bts_guidelines_pneumonia_child.pdfIn PDF document text
    • http://fefogisupiruro.rf.gd/is_freight_a_fixed_or_variable_cost.pdfIn PDF document text
    • http://fexulumusevemi.rf.gd/fumoturakofiditajevunedu.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_off0000ef1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 5160 bytes
SHA-256: cee65857328c794d2473bac68ca53b8135552753cdc5b7b55b587961f70e8871
font_01_sfnt_off000100b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B4 10356 bytes
SHA-256: 61d77a57904f38eec8aa0919dff4c9da37e1b3a45d60c77fecc305b22786b688
font_02_sfnt_off00012464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12464 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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