Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b7884770921fe9…

MALICIOUS

PDF

80.1 KB Created: 2021-03-30 16:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52c61f0a53d0f3f8cc9c7a1265f59dda SHA-1: 91e9171343a2869a64ea774d163279fe9f9b6812 SHA-256: 68b7884770921fe9dcfedea3f20b359153fa61b3b5acadf27f0f4149b86e7110
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of a large number of external links, many pointing to PDF files, suggests a link farm or a phishing lure. The 'SE_MFA_LURE' heuristic indicates the document likely attempts to harvest credentials or abuse multi-factor authentication. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://botokaw.ru/123?utm_term=save+whatsapp+backup+to+icloud+from+android
    • https://static.s123-cdn-static.com/uploads/4454056/normal_5ff901fa6c001.pdf
    • https://cdn-cms.f-static.net/uploads/4462976/normal_602489fa4d7f1.pdf
    • https://turoliletipusu.weebly.com/uploads/1/3/5/9/135969349/c4ab4d49.pdf
    • https://cdn.sqhk.co/patagarinixa/hibjfjj/live_football_tv_streaming_hd_download_for_pc.pdf
    • https://static.s123-cdn-static.com/uploads/4387419/normal_5fdec8d8ec15c.pdf
    • https://vasigigu.weebly.com/uploads/1/3/4/6/134607878/2600724.pdf
    • http://somixewavado.sportsontheweb.net/jipawil.pdf
    • https://varigezizado.weebly.com/uploads/1/3/4/4/134480105/likozog_zuxebopelebe.pdf
    • https://static.s123-cdn-static.com/uploads/4488572/normal_5ff580ba90fab.pdf
    • http://gaxenop.medianewsonline.com/garmin_vivofit_3_watch_band_replacement.pdf
    • http://kungfumalibu.com/61993501687jjkyu.pdf
    • https://cdn.sqhk.co/xugiwatokax/NUhiBSR/familysearch_indexing_program.pdf
    • http://subakegewoje.sportsontheweb.net/84485719893.pdf
    • https://static.s123-cdn-static.com/uploads/4421629/normal_60077d679dd8a.pdf
    • http://mkr-olimp.info/how_do_i_use_the_smart_diagnostics_on_my_lg_refrigeratoravfnp.pdf
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/runedizuwi-funokokonixo-zisanilafuwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_2b93a942b6294dc79b139c0eb6da5b2f.pdf?index=true
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_28d176cab65a46d0842e85d48f612da3.pdf?index=true
    • https://f72e0e13-a873-49c5-9cb5-3c2848b8c5b2.filesusr.com/ugd/f8ba4b_4070d8512e4340fe90f094cb6c41f9e7.pdf?index=true
    • http://lugivodunoxasi.atwebpages.com/99772077815.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_off0000ef9a.bin
54694c39921f094e9d1af6710b6ec4ec69035932567c44b8f124ce82cea7165c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 5856 bytes
font_01_sfnt_off00010363.bin
595d97071dc3553b9872d88641a6d2782645a24877ebd392aa18c5b0c77c364e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10363 2188 bytes
font_02_sfnt_off00010d2e.bin
1998a0f3106af5ca9e49512ba5218baace030493c94825557cf8b842780ca3fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2E 10840 bytes

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