Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87f5ccd04f13f50…

MALICIOUS

PDF

87.4 KB Created: 2021-03-08 00:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6ed5269e1c21a92c05b2aac49d40db3 SHA-1: 201a99e6528365b61548954d2333d14406e91783 SHA-256: f87f5ccd04f13f50503e41fe0983da827a4f477e0c95bfe6dfcfe97acdc26dbc
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is associated with phishing and financial scam lures. ClamAV detection and ML classification strongly indicate malicious intent. The presence of external URIs suggests the document is designed to redirect the user to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/123?utm_term=thinkorswim+fees+penny+stocks
    • http://passive-income.ru/pilewebewezujutewu6z40v.pdf
    • http://fanisore.sportsontheweb.net/84431351276.pdf
    • https://cdn-cms.f-static.net/uploads/4495694/normal_5fe6edd2f36af.pdf
    • http://artemk.ru/electron_configuration_worksheet_cheuk733.pdf
    • https://cdn.sqhk.co/bexuxoxabim/cy9BIhb/alley_bubble_tea_delivery_singapore.pdf
    • http://duzusedolatepe.mypressonline.com/chartered_financial_analyst_program_cfa_in_india.pdf
    • https://cdn.sqhk.co/kitijorawul/zhjCjcj/300_battle_glamorous_heroes_apkpure.pdf
    • https://cdn-cms.f-static.net/uploads/4470017/normal_5fdc5d3f96e1d.pdf
    • https://cdn.sqhk.co/kuruwoke/ibgge2i/38559031968.pdf
    • https://static.s123-cdn-static.com/uploads/4427284/normal_5fe1525c85834.pdf
    • https://cdn.sqhk.co/jabosuve/bhcha9P/yeezy_boost_350_v2_black_reflective.pdf
    • https://cdn-cms.f-static.net/uploads/4369494/normal_60449b5417787.pdf
    • http://rukozhop-guide.com/geometric_and_arithmetic_sequence_worksheetvd6w5.pdf
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5fd63954b85ce.pdf
    • http://midarujiwuvi.mygamesonline.org/75645618386.pdf
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fc68e4c55486.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rebesudanolo/25398515132.pdf
    • http://nununad.myartsonline.com/what_are_the_small_indentations_on_a_golf_ball_called.pdf
    • https://s3.amazonaws.com/wiwuxot/puvikufaxevoxu.pdf
    • https://s3.amazonaws.com/rubidokezive/32946426719.pdf
    • https://s3.amazonaws.com/mubemutolewe/8822865020.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011845.bin
0aaad630353989f50f24493efb30a87c5f11192d90f22363c5b1752515b51db3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11845 5220 bytes
font_01_sfnt_off000129fc.bin
7e2695bbe65c334b92d909b374a084317d0be967ab472ba7be0841baef8b19e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x129FC 11212 bytes