Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ad2530ed46c302…

MALICIOUS

PDF

82.9 KB Created: 2021-03-22 01:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b0478bd3befa807e6b920fa5e718ff3 SHA-1: 7e07c8eb6a9bad62622eed9433c52f74c7690aea SHA-256: c5ad2530ed46c302fb6ea81a371b1b039df29320f374273df908bc094d567116
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically 'https://jumiwimov.ru/wix?keyword=the+pig+saw+costume', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are commonly used to redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/wix?keyword=the+pig+saw+costume
    • https://cdn-cms.f-static.net/uploads/4369313/normal_6049c04b01a0a.pdf
    • http://nezowigivomi.scienceontheweb.net/vebaridajokejuv.pdf
    • https://cdn-cms.f-static.net/uploads/4454051/normal_6057cf748f1c8.pdf
    • https://cdn.sqhk.co/loxexafetivu/ejd6fSM/puzzle_forge_2_legendary.pdf
    • http://nitafibejuze.mygamesonline.org/zelufiretuvemikoma.pdf
    • https://cdn-cms.f-static.net/uploads/4428335/normal_5fda5e1ad4746.pdf
    • http://lusaxesa.iblogger.org/5429870292.pdf
    • https://static.s123-cdn-static.com/uploads/4499958/normal_5fffcc3d8cc5e.pdf
    • https://cdn.sqhk.co/zevolazezag/INjjChc/cute_anime_girl_with_brown_hair_blue_eyes.pdf
    • http://nejamaranidirit.22web.org/pivavikiban.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/feb3ab6a-8a73-47cf-85d2-4ad7639b1c99/monday_morning_leadership_david_cottrell.pdf
    • https://uploads.strikinglycdn.com/files/a0ad0265-0b6e-4576-b2c3-20fecf5a545d/2014_ford_mustang_gt_for_sale_houston.pdf
    • http://tesitanine.rf.gd/must_see_series_on_hbo_max.pdf
    • http://kunerev.epizy.com/xowiruzinojojubovarokexo.pdf
    • https://uploads.strikinglycdn.com/files/b5fec2c4-f65c-4a3d-b055-f44f83427bda/will_season_3_of_sword_art_online_be_on_netflix.pdf
    • http://geforagegi.atwebpages.com/bayern_feiertage_2020.pdf
    • https://uploads.strikinglycdn.com/files/14084916-8d65-4b8f-a6c9-9c53bef336a3/tv_wall_mount_panasonic_viera_32.pdf
    • http://pivimufe.atwebpages.com/oxidation_of_alkynes_with_kmno4_mechanism.pdf
    • http://nadurajamewe.epizy.com/gudumarabavotiboxigifik.pdf
    • http://tijopuzotozume.rf.gd/liruxibokegurenevagenu.pdf
    • http://beguresenoraw.epizy.com/pojelazekadigazalemikux.pdf
    • https://uploads.strikinglycdn.com/files/26084701-48b8-4b14-8f6b-6bb19ac81e5c/65364180188.pdf
    • http://nosijatigatu.epizy.com/wefipibet.pdf
    • http://wafugid.epizy.com/kan_ik_netflix_en_op_macbook.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_off00010838.bin
2cf2616edef652199e8f553fb8ebf734e7be6b4efb1fc86d7f3cff5a5122e664		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 5260 bytes
font_01_sfnt_off00011a15.bin
3f6a2a179c45ec5f761f641cd26f7fdc58cb50e1c58d05b24074a4040cc0779d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A15 10652 bytes

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