Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9c5881c4f756f9…

MALICIOUS

PDF

77.1 KB Created: 2021-03-13 19:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 72c6600d5fb46fdf198e4b41ab2558cf SHA-1: 71851553dd01e774392fa90783710eea1423ac19 SHA-256: 3a9c5881c4f756f9f597850b275d33737130a522861e53ef729660a0cff62b0e
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs and the nature of the heuristics indicate an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/wix?keyword=dominant+personality+type PDF link annotation
    • https://xemegejimeje.weebly.com/uploads/1/3/1/6/131636808/4054895.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/whdLIoX/old_casio_keyboards_for_sale.pdfIn PDF document text
    • http://larts.digital/mx_player_codec_armv7_neon_1._13._2l1yq2.pdfIn PDF document text
    • https://cdn.sqhk.co/zimofuzam/YThchii/greenleaf_season_episode_guide.pdfIn PDF document text
    • https://sebupemisopuba.weebly.com/uploads/1/3/4/7/134706320/logetupepepet.pdfIn PDF document text
    • https://faluwesidiji.weebly.com/uploads/1/3/0/7/130738597/474943.pdfIn PDF document text
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/nubunekep_juvaze_vaxuw.pdfIn PDF document text
    • http://lerob.info/webibowaly08cw.pdfIn PDF document text
    • http://phtech.site/84879215186581b3.pdfIn PDF document text
    • http://hhizmet.com/bekaradabadadolvuh38.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/a7lsREO/world_best_mobile_games_name.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/Hzxgghi/kexadafeseboveru.pdfIn PDF document text
    • https://cdn.sqhk.co/fixiwuwukufi/h5jinwZ/personal_statement_template_for_job_application.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/8b6912.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/ARYjbhf/can_knockdown_3_mod_apk_android_1.pdfIn PDF document text
    • http://todayshop.website/sarogunabivazegozuzufa04oh0.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/bfOidgd/amazon._co._uk_kindle_unlimited_gift.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/9t3hhgg/amazon_alexa_show_5_support.pdfIn PDF document text
    • https://cdn.sqhk.co/penunotati/ZiiFhdj/23554043381.pdfIn PDF document text
    • https://cdn.sqhk.co/gijimexuv/xigsuic/99140313501.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/34fe59f7-aa40-48a5-bb5b-3de6958cb460/rowawepinosidolodagozuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed3c9ec-95b1-4ff8-97ef-4429aad9b9f6/70915651395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78793bf6-397a-4310-8443-d23474d09fe9/vikovululu.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_off0000f1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 5064 bytes
SHA-256: 42675eb241a61ebedb01ca3581f0f5d9be1b775dcb0589ab185452e611191ebc
font_01_sfnt_off000102e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 10584 bytes
SHA-256: 259c7f0b9d03df8d1d600f17d7b73dcaa9a43cd0882e07094cee314ab976bbdf