Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed696d0369c3dfb2…

MALICIOUS

PDF

76.6 KB Created: 2021-04-03 05:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4ee3583a0680d6a934f7e40921ec5384 SHA-1: 53ca12f9556fb2283f2cad2e1f78d5d56cba7a09 SHA-256: ed696d0369c3dfb22b496d27f167998551e13e85b8a1864fc5edb7d34c3ab333
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, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to be a lure related to 'black history facts'. The primary attack vector is likely to be users clicking on the embedded links, leading them to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/award?keyword=little+known+black+history+facts+pdf PDF link annotation
    • http://musc-media.xyz/how_many_degrees_between_the_tropic_of_cancer_and_capricornf8o09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_6007a696600a6.pdfIn PDF document text
    • https://jatekowi.weebly.com/uploads/1/3/0/7/130776123/e38265ca8bc.pdfIn PDF document text
    • https://duvedibis.weebly.com/uploads/1/3/4/1/134131600/59c354b0.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/zilaf_xibisowujowove_walajixagu.pdfIn PDF document text
    • http://instahelpforbusiness.com/car_racing_games_for_nintendo_switchfwkps.pdfIn PDF document text
    • http://kuboduzuke.mypressonline.com/18119470281.pdfIn PDF document text
    • http://mini-camera-super.club/cell_cycle_and_mitosis_worksheet_answer_keyblhqs.pdfIn PDF document text
    • http://medway24.com/why_did_my_remote_start_quit_workingf17q6.pdfIn PDF document text
    • http://nikaold.site/dulepadixaribexomu7rq2o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_6060e9d15cac7.pdfIn PDF document text
    • https://supidopize.weebly.com/uploads/1/3/4/5/134521205/651664.pdfIn PDF document text
    • https://lekipavovat.weebly.com/uploads/1/3/4/3/134332936/6060105.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/8469857745.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/30239635515.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_58f1d00227f947779c27e53253e15133.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a363b291-f3a9-47f5-8edb-84a11e3d77b8/17835934396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e959d0-2c8b-41ee-82f3-a33be7aaa20d/96875743090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c288b8-b1bd-4ac2-92d9-2c4c6b1dfc40/tecumseh_carb_rebuild_kit.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_72635cf4fce14628b16fc43dbada172f.pdf?index=trueIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_ed33af0eeec945a69557549137715d63.pdf?index=trueIn PDF document text
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_fbd186477d8a457e9151fc357ac1be23.pdf?index=trueIn PDF document text
    • https://b9ecad59-ee1c-469f-8402-ddbad3bf215f.filesusr.com/ugd/84dab8_b5b1fdae64f74425ab8c7ea751a85361.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3517a69-7237-4b51-a9c1-78791405e62c/52719272821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f9c6e0-67b1-47b2-a266-6e1866831f55/judumaxikolewufonuj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 5580 bytes
SHA-256: 3b0683bef8e8589ca8c266a677d07595cdb205143ba63e1e0ac3629697e702df
font_01_sfnt_off000100a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A5 10552 bytes
SHA-256: e9c1d6027ebe2e5a2ffe35c1b9c7ff6b40cd579e073f35bca58a55d7c076b160

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