Malicious PDF — malware analysis report

Static analysis result for SHA-256 77cbcd8ef0227c5d…

MALICIOUS

PDF

74.4 KB Created: 2021-02-14 02:04:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 93c5aedc6862205c6434a2c1e084b3a2 SHA-1: c2d425d7329b2d5f35324992af160f6f3fba0c55 SHA-256: 77cbcd8ef0227c5ddf5ddd5ede7ad6589050f9802ea28a0c927cfefe651ca20c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=briggs%20stratton%205550%20generator%20manual PDF link annotation
    • http://nelitip.22web.org/rixekonagan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409619/normal_5feaf94751387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462341/normal_600a1ce367d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392207/normal_5fd8445bf2126.pdfIn PDF document text
    • http://xovekofetovo.66ghz.com/zininififeze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375093/normal_6002d149967aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470532/normal_6002b861e1848.pdfIn PDF document text
    • http://onatural.space/xazuzowelavatuga2xa20.pdfIn PDF document text
    • http://kumusivit.iblogger.org/nagari_ho_ayodhya_si_song_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527237/normal_6012c30b0bd9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476011/normal_60158ca193417.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/konudulamugixububu.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/sefupedovaramusefub.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/sukarinevumomulolobu.pdfIn PDF document text
    • http://zevuketeno.rf.gd/31125660544.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_off0000e4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CC 5320 bytes
SHA-256: 423126088717e369dbb89fc1466a5a3cde91ce85e4ba8636f90ad41ffd835269
font_01_sfnt_off0000f6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CF 11532 bytes
SHA-256: 33a9d78fda26c51a92a8e03860ca52ddc64cf182a1c5021951c6d4aebaf20934