Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccacaf0d5da85977…

MALICIOUS

PDF

83.9 KB Created: 2021-05-02 17:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5e88e00e335f3007660bdae4817b3203 SHA-1: ef30ec20eda14e2fd4989b87130439b47d753772 SHA-256: ccacaf0d5da85977bb03235c8e3f82a4c2ecc292bad391b62b7e23dad3247413
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation scheme. One notable URL, https://nipisod.ru/strik?utm_term=how+many+ford+focus+svt+were+made, appears to be a redirector. The presence of embedded URLs and the overall structure strongly suggest an attempt to direct users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=how+many+ford+focus+svt+were+made PDF link annotation
    • https://cdn.sqhk.co/peretudiwi/GhjrhbX/wonogek.pdfIn PDF document text
    • https://cdn.sqhk.co/rotefuver/ejbgcia/hidden_object_games_for_pc_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzodidudi/RwO3Cii/buravujoburuneroropinoji.pdfIn PDF document text
    • https://wivexisi.weebly.com/uploads/1/3/1/0/131070498/wutirevenemugab_didolira_ripolal.pdfIn PDF document text
    • https://cdn.sqhk.co/losajaro/3iimDif/autograph_audio_songs_tamil_ing.pdfIn PDF document text
    • https://sisemukogonutop.weebly.com/uploads/1/3/4/2/134266332/vokifumokori.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/Ov3xHhe/asteroid_crash_simulation_game.pdfIn PDF document text
    • https://xizirujikalowev.weebly.com/uploads/1/3/1/4/131454807/9bf38328fb778.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/xuxifuzituwu/79632945397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14099715-90f1-49d3-9551-3dc3c08de0ab/craftsman_10_inch_miter_saw_with_stand.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_6541a24224be43d8b6786c7eb6c08af1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9bd0ce-a7ab-410b-877e-d7de96cfbc05/97873597669.pdfIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_bc12989a55e44f709fd5779836679d58.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33185ad9-209c-4a3c-9d88-c242ae9a4a03/91637136435.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_f5a2960e378745259290b2883003775d.pdf?index=trueIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_ceceef4781864bad902219f6f1520f0a.pdf?index=trueIn PDF document text
    • https://264cdfe8-48fc-440e-bff3-938583425051.filesusr.com/ugd/cd20dc_17265aa6196243a5ae0954f4f909e01a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27d3a8c-ec15-4a42-967e-6fe3d43ba459/how_to_make_a_real_xmas_tree_stand_up.pdfIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_835e5513d982450e81054c346d0706df.pdf?index=trueIn PDF document text
    • https://351e5f87-f9e5-4015-92cd-d601692b9ec3.filesusr.com/ugd/a0d0d3_fe8bbe58fb0b4252a85f413f5a0cb93f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/adultery_paulo_coelho_romana.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_off0000fcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 5184 bytes
SHA-256: 33f1fdc8a69c5673d67c0ea96128c22f986b96439857e71a32732533f07e38bb
font_01_sfnt_off00010e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 11040 bytes
SHA-256: 2d17db6922c63ec20f3fc43fd408cf5d2fa8b7c52ebb253701a7acfc7906bb17
font_02_sfnt_off0001343c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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