Malicious PDF — malware analysis report

Static analysis result for SHA-256 9211be30416a1cfc…

MALICIOUS

PDF

78.6 KB Created: 2021-03-22 13:00:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c9057f46b37bd0433df1fdc531d050a8 SHA-1: bd09b94c11704ff45b3b9e75cd0ca375a511fce8 SHA-256: 9211be30416a1cfc1dc10371af71484f7dfa00f85b21e2336e9ad23c76220ce8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to distribute malicious content via a large number of links. The presence of embedded URLs suggests an attempt to redirect the user to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/wix?keyword=vmware+vcap+study+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485580/normal_602c4f03ac551.pdfIn PDF document text
    • http://depupejaxidolip.22web.org/19307531231.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480173/normal_5ff41d00f14f6.pdfIn PDF document text
    • https://gozobamo.weebly.com/uploads/1/3/4/7/134714837/8cc73d.pdfIn PDF document text
    • https://kokilanoru.weebly.com/uploads/1/3/4/0/134012510/6191341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456379/normal_6044f6af5edbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417669/normal_5fdf2e6c907d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444386/normal_60191198e369e.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/5977f34d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416496/normal_6015196d8859b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5fcb8f3722b57.pdfIn PDF document text
    • https://dawawasokiju.weebly.com/uploads/1/3/1/4/131408838/kodezonafek.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
    • http://gitavini.epizy.com/lakesofoxujunozafif.pdfIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_0efb2581b3a9410280dbf994cd1331f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ff6011-38ad-4084-94a8-4e424f2e5225/sotaligezexatalavejo.pdfIn PDF document text
    • http://fadugenogow.epizy.com/can_you_get_autocad_on_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850183e1-05e9-4fb7-91e3-f0a0067755d2/elementary_korean_rutgers.pdfIn PDF document text
    • http://xibusen.rf.gd/swot_analysis_ebook.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_b47b2eccc9944ac48c246c0fe3adbbe1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0c5327-c2ba-44ba-a11a-e77c12ccc4f9/how_to_heal_from_fear_of_intimacy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca613471-efa1-422c-abca-7bb3b3a47d95/womens_roles_during_the_1950s.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_off0000e8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EC 5248 bytes
SHA-256: dc3b1c14eeb61e13b0357e30500bdcd41ceaea30d657317f6aae61f9d681ae23
font_01_sfnt_off0000fade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADE 10172 bytes
SHA-256: f8a0189efacba5beb362369c29abdf8a9d1767d179edae611495129fe5393e1a
font_02_sfnt_off00011dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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