Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c44df1c31003500…

MALICIOUS

PDF

74.3 KB Created: 2021-03-18 12:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1cf2cd9545d121fadd0c85214d0a77a2 SHA-1: 18dd8deb42064b4aea86f3965bd8846be2ad0529 SHA-256: 0c44df1c3100350093bb75686c51275e77240b0a9957e300c5ff057f221fe683
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://zajinet.ru/aws?utm_term=letra+y+acordes+de+yo+sin+tu+amor+alicia+villarreal PDF link annotation
    • https://xovawezovikax.weebly.com/uploads/1/3/0/9/130969403/vadekut-fukur-vijimemapejuxa.pdfIn PDF document text
    • https://mogisitubetaw.weebly.com/uploads/1/3/4/4/134496388/litigunanivezafusi.pdfIn PDF document text
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/38e40866278.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/thggOOf/vamoderukonomezijowukapi.pdfIn PDF document text
    • https://misopiwulasi.weebly.com/uploads/1/3/1/8/131856666/cfbd89.pdfIn PDF document text
    • https://cdn.sqhk.co/jiliroba/jfcjaha/61588917036.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/822269.pdfIn PDF document text
    • https://cdn.sqhk.co/daxonotetil/spflhg5/crowd_city_zombie_survival.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/ojajgVj/16597888377.pdfIn PDF document text
    • https://cdn.sqhk.co/wemavutulow/gWUhehh/download_marvel_contest_of_champions_mod_apk_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/WjghaKH/87140600047.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/Bijjfhg/43226823737.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/b9hfjbW/roblox_studio_login.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/jhoXqxW/zivorofiv.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/6hejhgc/18726914315.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d288a7-7870-4115-a1ec-598cee0d3001/pujotutotisikokefesumitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd751ad6-b21f-40d7-87b8-a172ca6299aa/jobifaxatisesunip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f981e1-33b8-4842-a107-3c1f7016bc5b/82821306085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3656172e-5da2-427b-8f06-076eabe1e697/how_to_add_omnisphere_presets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736c66cb-99f2-4828-8415-f628556e0593/bolebedetesuweluwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5693fe9-788f-4df9-9b8e-ac61806543cb/19787859125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9c0ec8-c4c2-4111-a5dc-856a9c1f9112/68450995127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c19756-56e1-4133-bffa-1ac3bac5839b/rca_visys_25424re1_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ab2e55-a78d-47f8-b153-4354d08ac8f9/10344269695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7177893d-e637-4f1e-985c-616bd9e88998/what_was_the_three_part_strategy_for_suffrage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ad7ff70-207a-462d-a1c8-0fce8790ed1a/tp-link_hs100_manuale_italiano.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_off0000e242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE242 5188 bytes
SHA-256: 5f23ddccca304f24b5515f49d822af602a8d7301a9af02c1f720a16ee1f70431
font_01_sfnt_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 11284 bytes
SHA-256: 5b67efac153eb61c0a841f08fa1f496b5701236b7272005744fa67447a3b9a33