Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f88fff8eeb693d1…

MALICIOUS

PDF

73.1 KB Created: 2021-02-10 10:03:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d3c752d79de678a51152432d5b357d89 SHA-1: f2b932d782cfcec3208d02383f1fe89d60eb98fd SHA-256: 4f88fff8eeb693d1cac4a1fee84d201f07083e39973bd9df77f2073d1506a1ac
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://baarspo.ru/wb?keyword=nccn%20guidelines%20melanoma%20screening PDF link annotation
    • http://vquest.website/agria_corporation_annual_reportif9kv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402938/normal_60152c4532af6.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/24b57a1.pdfIn PDF document text
    • http://biwijenanun.22web.org/sebubozade.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/hjCVgcj/72298612640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5fea35c74196a.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/hJhcghH/alone_season_6_cast_jordan.pdfIn PDF document text
    • https://zibomuloxeju.weebly.com/uploads/1/3/2/8/132815028/3655379.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/FieJyGr/nodiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_60238bf5e14aa.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/jbv1j0v/beat_the_buzzer_game_hire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_5fd7ea40b9b3a.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/qZKijj9/nixupegobuvebegeruraje.pdfIn PDF document text
    • https://cdn.sqhk.co/nabixisaf/ijLTPkU/maxxis_pace_tubeless.pdfIn PDF document text
    • http://gejobukopap.iblogger.org/font_hanacaraka_untuk_microsoft_word.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/iigetgi/defender_hd_1080p_dvr_password_reset.pdfIn PDF document text
    • https://lobodilogiji.weebly.com/uploads/1/3/1/3/131382226/birimija.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/vatolukedojowed_dukegamawufute_goxamezilojuki_maduzanuzup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE181 5228 bytes
SHA-256: 9117516c18bbfb880a6a1c95fac3cb45f215e09e2bd7b39119df91f7947e0ca2
font_01_sfnt_off0000f336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF336 10560 bytes
SHA-256: b5f8edbcdc4baea4b35b7f9b121798f9794702f1b7ba09f4050e1d05e29a22d2

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