Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69337629bd3c15d…

MALICIOUS

PDF

80.4 KB Created: 2021-05-19 00:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f35c2b357a2c590767cb7203d644ef15 SHA-1: 9e28a39bcb5995d3b07825280a892ec51091b484 SHA-256: f69337629bd3c15df0da4bd45ba6d37c5e0a787d6e09ef25dfa57d6b6eabe7ae
276 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file exhibits multiple indicators of malicious activity, including a high ML classification score and ClamAV detection as a phishing trojan. It contains numerous external links, with a primary suspicious URL pointing to 'xezojetit.ru'. The document body, though truncated, suggests a lure related to transferring WhatsApp chats, likely a pretext for a phishing attempt. The presence of 'SE_PASSWORD_ARCHIVE_LURE', 'SE_MFA_LURE', and 'SE_PAYMENT_REDIRECT_LURE' heuristics strongly indicates a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://xezojetit.ru/strik?utm_term=can+i+transfer+my+whatsapp+chats+from+android+to+iphone
    • https://cdn-cms.f-static.net/uploads/4408584/normal_6010d4508508c.pdf
    • https://metiwefipit.weebly.com/uploads/1/3/1/4/131406934/77f34379b73ae97.pdf
    • https://cdn-cms.f-static.net/uploads/4387229/normal_6048a6a511a22.pdf
    • https://cdn-cms.f-static.net/uploads/4417129/normal_5fd3d9e25babb.pdf
    • https://cdn-cms.f-static.net/uploads/4384851/normal_6022b216f1b31.pdf
    • https://virubavu.weebly.com/uploads/1/3/4/7/134755547/kofiwafokoki.pdf
    • https://zivejopoji.weebly.com/uploads/1/3/4/2/134266783/cdaf218bd8.pdf
    • https://static.s123-cdn-static.com/uploads/4488335/normal_5fcb3baa1737e.pdf
    • https://cdn-cms.f-static.net/uploads/4402247/normal_603a9522563b0.pdf
    • https://static.s123-cdn-static.com/uploads/4474998/normal_5ffa98e6d82ce.pdf
    • https://siteketu.weebly.com/uploads/1/3/4/3/134362374/suvuta.pdf
    • https://romovemesokawaj.weebly.com/uploads/1/3/4/4/134479736/potibezufu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fuvidokibet/pneumonia_guidelines_idsa.pdf
    • https://s3.amazonaws.com/zomuzigo/48016392527.pdf
    • https://s3.amazonaws.com/julaxel/what_is_the_return_type_of_constructor_select_one.pdf
    • https://s3.amazonaws.com/nalifij/69287554814.pdf
    • https://s3.amazonaws.com/novifamigot/78135486.pdf
    • https://s3.amazonaws.com/lekelepowo/how_to_speed_up_my_apple_tablet.pdf
    • https://s3.amazonaws.com/rujimidujek/bedingte_formatierung_excel_wenn_formel.pdf
    • https://s3.amazonaws.com/vavapekadoliti/richard_rodriguez_hunger_of_memory.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_off0000f07a.bin
9961491ee1fb5f69f00959184881201474fdf4d6582bdea2fc596c0900a65a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF07A 5464 bytes
font_01_sfnt_off000102f0.bin
7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 1936 bytes
font_02_sfnt_off00010c37.bin
d46016a03e813068d574435dd46f87187f7e13e6b13a9d8149b08673af6d06eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C37 11520 bytes

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