Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc1b94406bc37c6…

MALICIOUS

PDF

79.1 KB Created: 2021-05-04 09:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c053ef5c83d15d9cb8c3a25b59a5b481 SHA-1: fe8be6b72649d9cf0ad997eff93fad4db26c2f40 SHA-256: dfc1b94406bc37c6578dfe7a6400356855c252633188539206e158b2acdb165b
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/strik?utm_term=grammar+english+check+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405419/normal_5ff4f9fd7f141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481397/normal_602716bc2fc9d.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/eZ2pkii/types_of_ants_with_wings_in_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/Hhihiih/lamitedaperogalotezad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504641/normal_5ff87c005f96b.pdfIn PDF document text
    • http://vsedlyatebya.xyz/13821229702x3yrb.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/gdjaNgg/juleforozegigegemosalud.pdfIn PDF document text
    • http://copyright-notice-ig.com/angry_birds_games_android_freekmfua.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382789/normal_6000d9886979c.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
    • https://s3.amazonaws.com/mipeboro/cannibalism_in_the_cars_mark_twain.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/34893905300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dea9b1-6173-44d7-999b-38ee5f4dc95a/ashland_boy_scouts_christmas_trees_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/banomoya_gqom_mix.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/35393540497.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/lederov.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/keygen_autocad_2010_64_bits.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/the_standard_model_of_particle_physics_horizontal_poster.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/26974810580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baeb96eb-d40c-4282-827b-f0af7cf0588a/heroes_dioses_y_semidioses_dela_mitologia_griega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c6d6e9-db98-4926-9645-8be8944e76ee/uniden_bearcat_bct15x_firmware_update.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/android_studio_autocompletetextview_adapter.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_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 5016 bytes
SHA-256: 437dbe00b9b2c15ddb119658ac457f78dd5763e7bc3aa2d59bcfa7d80e002edb
font_01_sfnt_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 10400 bytes
SHA-256: 34798d34aafe858420219295038c89a75372b4918e3cdee6b510af1a4cd9371e
font_02_sfnt_off0001209e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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