Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f52075118ddbfe9…

MALICIOUS

PDF

115.0 KB Created: 2021-03-06 03:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ab4373c9de658d8be51ee62da551a90f SHA-1: 01acf008991cedb55e0657b70f3bfb2b56908c3a SHA-256: 1f52075118ddbfe93499a8c30305ccc322d081c180c0ceca2d2ee12678041fe1
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting or redirector infrastructure. The heuristic firings indicate a malicious redirector link and a link farm, suggesting the primary purpose is to drive traffic to potentially malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+do+you+set+up+a+celestron+telescope In PDF document text
    • https://cdn.sqhk.co/tezikegoj/pijP7hc/my_oldboy_gbc_emulator_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/jusupovexewa/7gdzjj1/65328366891.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/geTdR52/70177341582.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/idjyngc/goal._com_en_gb_uk.pdfIn PDF document text
    • https://soberonapi.weebly.com/uploads/1/3/2/6/132681790/bavemajidefapa.pdfIn PDF document text
    • https://cdn.sqhk.co/pinepopowig/jqGPqge/t_i_sky_factory_mobile_hack.pdfIn PDF document text
    • http://lakulikelanu.iblogger.org/cancer_de_pancreas_tratamiento_nutricional.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzivogawa/giiejf5/99118510854.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/XF0jfgf/new_bollywood_songs_2020_mp3_download_mr_jatt.pdfIn PDF document text
    • https://zolagefotatol.weebly.com/uploads/1/3/4/7/134709454/monore_wizel.pdfIn PDF document text
    • https://siwelizotelet.weebly.com/uploads/1/3/1/4/131437983/4a1cc2a5a2c272.pdfIn PDF document text
    • https://wifamiwipefap.weebly.com/uploads/1/3/0/7/130738562/5f6d632ab84f6.pdfIn PDF document text
    • https://ferofetilusef.weebly.com/uploads/1/3/5/3/135346026/8400390.pdfIn PDF document text
    • http://lagutobokoza.22web.org/agreement_format_between_two_parties_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/h89prjc/bad_hair_day_meme_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/cj56hbr/uber_driver_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vokotofetatevud.rf.gd/mafuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/medibuvujudepobone.pdfIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_817d2ea54aa94b8499b35e7f2297d677.pdf?index=trueIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_736888b480134dc0a95d58c8303afb55.pdf?index=trueIn PDF document text
    • http://levuvov.epizy.com/75721722185.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_c77556cb5dce4353af22e86a86c1a977.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_1a6bb77feaf34455bdd586a2de4f6e76.pdf?index=trueIn PDF document text
    • http://xewepipesu.epizy.com/asus_x205_ssd_replacement.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_22656295396549949440e6e5d87c14ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/66804908249.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_off000179b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179B5 2940 bytes
SHA-256: 5205dc029b2d4b0ae44ddd8c96d056e1801b9f6b3c115db4e44038fa36e83b83
font_01_sfnt_off00018441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18441 5220 bytes
SHA-256: 03a21cdeb4152a196d5f5b763e29ca16ea25ee772626afea77e8c8f0099285d8
font_02_sfnt_off00019626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19626 11332 bytes
SHA-256: 6fcef5cc1a2569784c56ca656dee1bf6bc5a70756c345ff1b133753786c60a2a