Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51cd14d621de58d…

MALICIOUS

PDF

82.7 KB Created: 2021-03-14 04:12:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b5fd87ed325b107d5590e38d1e62fe53 SHA-1: e94b6595e71021be91870aabe05d63266bb291e6 SHA-256: b51cd14d621de58d962cd4ecdfdde23d2ddea99c719077ce6aba924d444e5abe
136 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The presence of an embedded URL pointing to 'gimoguvi.ru' suggests a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scanners.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://gimoguvi.ru/123?utm_term=pc+bluetooth+software+free++windows+8 PDF link annotation
    • http://lebizifijafaxim.medianewsonline.com/what_is_the_moca_assessment.pdfIn PDF document text
    • http://deluzipexukal.22web.org/the_lion_the_witch_and_the_wardrobe_animated_dvd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390638/normal_5ffaa5ee563bb.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/hegtgeA/kelozezu.pdfIn PDF document text
    • http://zaxomexabubik.iblogger.org/how_can_i_tell_what_year_my_samsung_tv_is.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/jazitevemodewikozidinura.pdfIn PDF document text
    • http://mesretly.xyz/799905926659ob2t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408186/normal_5fe82e94674fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453900/normal_602aa7de1079d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489732/normal_5fd385b014f23.pdfIn PDF document text
    • https://cdn.sqhk.co/penomufepuk/5scCgiu/pencil_pouch_in_spanish_translation.pdfIn PDF document text
    • http://jushq.club/14684098637vrguc.pdfIn PDF document text
    • http://ccckkkkk.space/oil_change_ariens_deluxe_28_shobnc1k.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/h3hh447/14431189091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5fed5fbd2047d.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/gezetega/cghs_plastic_card_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/37917563199.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/32456682014.pdfIn PDF document text
    • http://lenixad.epizy.com/relaxation_techniques_for_stress_relief_helpguide.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/85153066216.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/merriam_webster_crossword_answers.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_off00010591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10591 5536 bytes
SHA-256: c60c18acecb5114fe38576acd830ef243de64dca527f92f5df03b814b5fc0119
font_01_sfnt_off0001186c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186C 10748 bytes
SHA-256: 24a87584044ec3dc9ccb33314ef60c51bdf64ab2602b033dda27c5d50e3a8a88

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