Malicious PDF — malware analysis report

Static analysis result for SHA-256 e577930b2647cff4…

MALICIOUS

PDF

87.2 KB Created: 2021-03-14 22:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a94eb0204228f7a7f7f76284756f419 SHA-1: e4de97e8899c8787ccbf4a604f5ef2a4ab6f776b SHA-256: e577930b2647cff4d7a407b69443dc8e0120191d5901ac9f31faf154935beb22
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM'. One of these links, 'https://resalured.ru/strik?utm_term=charge+air+pro+5hp+60+gallon+air+compressor+parts', is classified as unknown reputation and is likely part of a malicious campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://resalured.ru/strik?utm_term=charge+air+pro+5hp+60+gallon+air+compressor+parts
    • https://warogowi.weebly.com/uploads/1/3/1/6/131606132/91e6d04fd3fe.pdf
    • https://cdn.sqhk.co/buganixezu/5iijfgf/final_fantasy_viii_remastered_pc_review.pdf
    • https://gokaraxonupesi.weebly.com/uploads/1/3/4/4/134468062/waxejotereruxal_wujoseg.pdf
    • https://cdn.sqhk.co/nerutamar/icwjeFE/genshin_impact_reroll_guide_android.pdf
    • https://cdn.sqhk.co/kigimole/hdjk5hf/planescape_torment_walkthrough_sorcerer_s_place.pdf
    • https://cdn.sqhk.co/badaxiloru/ii4gczT/netflix_windows_10_location.pdf
    • https://cdn.sqhk.co/xajamenujo/ceibKig/80850413622.pdf
    • https://cdn.sqhk.co/xidatelo/hcibSif/12090941465.pdf
    • https://kiwepuzimogavuf.weebly.com/uploads/1/3/0/7/130776877/poraxazujurel.pdf
    • https://cdn.sqhk.co/dutedape/0hgJhd8/gameboy_console_storage.pdf
    • https://cdn.sqhk.co/lonuxonemor/jfqGGhj/ddpai_app_review.pdf
    • https://cdn.sqhk.co/xamitarerivu/gNhbdox/59672524701.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_777fadf1d39f4ca4b1ffe173dd303e47.pdf?index=true
    • https://s3.amazonaws.com/penefelomiju/bacterial_transformation_heat_shock_method.pdf
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_22564f2be68643c18811d8e11cbc72c3.pdf?index=true
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_47a62dafefb6467592bf98b59fcf1b1c.pdf?index=true
    • https://s3.amazonaws.com/miledu/8143740770.pdf
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_dc7253e4e46e4d25b536e582d2cf93f6.pdf?index=true
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_d1c18cfece5342a9973b9e304206d60b.pdf?index=true
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_12b1102a58574361b770ac8c0a6f6bda.pdf?index=true
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_205893353fc24ea28bce40ac3eac25e6.pdf?index=true
    • https://s3.amazonaws.com/gedesisumi/tujobowatu.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_off0001050d.bin
3dc81b0e5e1bfa3053b23b323821586e90af4600843f13513ba757b5021a680b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 5580 bytes
font_01_sfnt_off000117d3.bin
093070caedfa5dc8eff30c33010ed8216c70aa444899994bea3065c9bdb99f25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117D3 11984 bytes
font_02_sfnt_off00014075.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14075 4324 bytes

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