Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a11855fa62587b6…

MALICIOUS

PDF

83.1 KB Created: 2021-03-11 02:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d274f346f1d8a84440f6c8f0408226d2 SHA-1: a7e3065ee20bba6e5ad8a6619ee6447c16c20fd3 SHA-256: 1a11855fa62587b6f37af1e079af533f83f9482390a400b76f89f4cd3fda8647
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, one of which is a suspicious domain related to 'angielski dla dzieci'. The PDF structure and embedded links suggest an attempt to drive traffic to potentially malicious or phishing sites, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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://soxebez.ru/award?keyword=angielski+dla+dzieci+materia%25C5%2582y+do+druku+pdf PDF link annotation
    • https://cdn.sqhk.co/lisakopew/ezjixIS/3588605247.pdfIn PDF document text
    • https://panonalosisewe.weebly.com/uploads/1/3/5/3/135316392/80c5105c185ef.pdfIn PDF document text
    • https://tebiwexarug.weebly.com/uploads/1/3/1/3/131380746/8546875.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/jijjigg/amazon_prime_now_driver_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/fadujiwexi/jhiahbF/nerogelu.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/rijdjch/78519884593.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/gigH1ii/27688923006.pdfIn PDF document text
    • https://wiwitubiz.weebly.com/uploads/1/3/5/3/135351816/1968180.pdfIn PDF document text
    • https://cdn.sqhk.co/loxepafigav/echhHod/capture_the_flag_game_online_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/jgheidM/duzumor.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/Uhegdib/birdy_movie_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zobazulibes/eMhhlvF/22086582087.pdfIn PDF document text
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/lonigemedoge-jodobesuzajul-jifoxejazimup-lixukez.pdfIn PDF document text
    • https://cdn.sqhk.co/daruluneti/EjhLge1/download_game_dark_sword_2_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01477de9-116b-42a6-a62c-54244336611e.filesusr.com/ugd/dea9e9_4da2b310dbce43699ac438d6ccbd5bb2.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_c1cffea979754584a7efb304c35b7c43.pdf?index=trueIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_51d3bf5229a2434a9ab2b53d660d4b40.pdf?index=trueIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_3a687659e52948c6a1a6ca2ff5599c1a.pdf?index=trueIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_01cf9b9fd2b84197af473e6464ad409b.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_112b0bb5b3e64f7994c702586603a001.pdf?index=trueIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_962228c591b04062a2d6302df06432ba.pdf?index=trueIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_e8f9214cf1cb499492d6951087fd0c10.pdf?index=trueIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_c4904e19ff434f338c254dd1115fe1f1.pdf?index=trueIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_d0f3b78f64024172bf09ffe76e2db246.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE372 5736 bytes
SHA-256: c75e94abc193793da1a4ae64ed82e735df0914dfb901539bc2d923e5774ecacb
font_01_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 12344 bytes
SHA-256: e729db6b628613cfc24701d0a60f4ff6ed0b6fc3b9c175408dacfab62ecc093f
font_03_sfnt_off000125fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FA 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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