Malicious PDF — malware analysis report

Static analysis result for SHA-256 877e301baabbf086…

MALICIOUS

PDF

210.0 KB Created: 2021-02-10 07:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b7df2a898bbfe92ebbe4b3fcba36d049 SHA-1: 025702610605552fd3cc00dc7fcfe15ca1e55bd3 SHA-256: 877e301baabbf086d9a2a15c36b016b5923744e99eaa3c6a7636b86ec313ccce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a credential phishing lure impersonating Apple. The embedded URLs and the document body suggest a social engineering attempt to trick the user into downloading a malicious PDF disguised as an application form. The presence of multiple external URLs indicates a likely attempt to redirect the user to a malicious site or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://bojojibapofaz.weebly.com/uploads/1/3/4/4/134478515/xulipelusefoz_zupavigevavukut_mepinixex.pdf.
  • 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://jacksth.ru/123?utm_term=mta+subway+assistant+mechanic+test+application+form PDF link annotation
    • http://evakuator-uga.ru/boo_berry_cereal_barsevwyo.pdfIn PDF document text
    • https://cdn.sqhk.co/gotoruzud/aWZge0z/meteor_shower_august_2020_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/icpPZkL/switch_pros_mount.pdfIn PDF document text
    • http://xurijozidarov.22web.org/guide_michelin_itinraire_en_francais.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/9OjcdsH/mixosijipibid.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/sHJihid/radan.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/d8hdHji/39431993664.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/hehchdl/making_cake_icing_thicker.pdfIn PDF document text
    • https://bojojibapofaz.weebly.com/uploads/1/3/4/4/134478515/xulipelusefoz_zupavigevavukut_mepinixex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zalikizo.epizy.com/rapotepixut.pdfIn PDF document text
    • http://gijaguvid.rf.gd/correct_address_format_for_spain.pdfIn PDF document text
    • http://ripofosefalub.rf.gd/71635712927.pdfIn PDF document text
    • http://rafoputoxuxu.epizy.com/arcane_mage_pvp_guide_wotlk.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_off0002f845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F845 5596 bytes
SHA-256: 4aede20af1b2e539d76ddb142be42880631657d9199e7cc7237ca70c304a9b00
font_01_sfnt_off00030b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B44 13648 bytes
SHA-256: a9dd078bc20b19110a044197fb656a085a37e0133124ceab764fe2183752e728

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