Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4cdb7299f1c6ce…

MALICIOUS

PDF

81.0 KB Created: 2021-04-04 05:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c933a980014fea7b90914310794cc7ad SHA-1: bf5532efeb090cf5cf19f7984d579451ac65bead SHA-256: 9e4cdb7299f1c6ce966adf1d2f1c9c30f0710000cfe7fc6e9bc205780f6cb48c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of an advance-fee scam, attempting to lure users with promises of downloads or prizes. The presence of multiple external URIs, including one pointing to a potential installer, suggests it's designed to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://crophysi.ru/wix?keyword=busybox+installer+pro+apk+free+download
    • https://cdn.sqhk.co/goxobuve/fmfjj9N/object_treasure_hunt_application.pdf
    • https://cdn.sqhk.co/gituridewo/2iemUzq/peace_equalizer_microphone_settings.pdf
    • http://gorapesebo.iblogger.org/totodev.pdf
    • https://cdn.sqhk.co/pobopuwubox/egeVhgp/best_psx_emulator_for_windows_7_64-_bit.pdf
    • https://zixixowiw.weebly.com/uploads/1/3/4/6/134605173/f90a1ac60428b9a.pdf
    • https://static.s123-cdn-static.com/uploads/4454299/normal_5fc61066d25ae.pdf
    • https://cdn-cms.f-static.net/uploads/4486563/normal_600d6ea709899.pdf
    • https://cdn.sqhk.co/femokuxajuz/dnLhahc/toriborasaxuvuribaku.pdf
    • https://favobilumosuxo.weebly.com/uploads/1/3/4/7/134733594/valovina.pdf
    • http://nepizomojafedez.22web.org/what_is_a_de9_and_de9c.pdf
    • https://cdn.sqhk.co/miwataxanis/hhjhhie/kuzuzunedikasogodarovozi.pdf
    • https://nulabelavomeviz.weebly.com/uploads/1/3/1/4/131413951/2042ca62be.pdf
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/5430325.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zufaxepixiguxax/how_to_write_a_college_admission_essay_format.pdf
    • http://pubometev.rf.gd/48486775086.pdf
    • https://uploads.strikinglycdn.com/files/8a06b13a-c012-41e5-a220-ca4c6c2719e5/dd_4e_best_feats.pdf
    • https://uploads.strikinglycdn.com/files/5ce73d77-5d1f-4ed8-a868-246cc50c5739/buguwarafop.pdf
    • https://s3.amazonaws.com/tobaziw/akhiyan_song_mr_jatt_happy.pdf
    • http://guxijukamudeze.epizy.com/biohazard_waste_management.pdf
    • https://s3.amazonaws.com/lulelepese/onan_diesel_generator_maintenance_kit.pdf
    • https://s3.amazonaws.com/netinuwa/85054410039.pdf
    • http://vixaxupofu.rf.gd/34857192471.pdf
    • https://uploads.strikinglycdn.com/files/2dfdc68a-d136-4343-a39c-af9b94c10619/samsung_ue50tu8507uxxu_50_smart_4k_ultra_hd_hdr_led_tv.pdf
    • https://uploads.strikinglycdn.com/files/ad7664ff-27ff-4e64-8398-9890525d4b26/55642934873.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc3.bin
c19f2e3d24373fcb95127a126fe1660f88312f39866310bf29f526c0bbdf7325		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 5432 bytes
font_01_sfnt_off0001005c.bin
c7eae59c8085afaec1225c87743fa81873400c50b5d2f8ef146b76cdbfd9633c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1005C 11780 bytes
font_02_sfnt_off00012831.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12831 4324 bytes

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