Malicious PDF — malware analysis report

Static analysis result for SHA-256 326b139854b6223a…

MALICIOUS

PDF

76.1 KB Created: 2021-04-10 23:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 41b3e9868bc549cf024500f135826c6e SHA-1: 549b0e8fda16eb64042b2ab06f6473388c4b147d SHA-256: 326b139854b6223a7584d30b18dd95c4551c2ec9693ee7cbd80c9c4fc6e289c9
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9996

Heuristics 4

  • 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://dafemum.ru/strik?utm_term=forming+adjectives+from+nouns+and+verbs+list+pdf PDF link annotation
    • https://cdn.sqhk.co/momujolo/iaGjfsL/do_amazon_prime_now_drivers_see_tip_2020.pdfIn PDF document text
    • http://english-10.site/lirekaromabowiw8cqx1.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/alexis_kagame_la_philosophie_bantu_compare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_601ba9403662b.pdfIn PDF document text
    • http://cg-designer.xyz/fedoxikomorovonusebuzelup6h431.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/FjcMggG/61291501258.pdfIn PDF document text
    • https://vidijizuv.weebly.com/uploads/1/3/0/7/130776341/lepuzitovirewe-lokalegajil.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/exhb9he/king_followers_and_likes_hack_apk_download.pdfIn PDF document text
    • https://ravuripuzi.weebly.com/uploads/1/3/5/9/135958818/jaran_purepeteroxum_jagukinim_fogorazugugikop.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/jjefbji/pedaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498345/normal_60469e3381293.pdfIn PDF document text
    • https://cdn.sqhk.co/xexogataza/hbxjgAI/motorsport_manager_mobile_3_apk_ios.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/racecards_racing_postdomp2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414152/normal_5fd06c2f9d7ce.pdfIn PDF document text
    • http://dreabling.online/vemadegofotonodedasatuvoz6hv8.pdfIn PDF document text
    • https://didefitelov.weebly.com/uploads/1/3/0/8/130874246/joxemijodo.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/zevivuxovotifala.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/bakery_equipment_list_with_pictures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_1252a0ddd5a04c45a977e5b506d26116.pdf?index=trueIn PDF document text
    • http://wazipegemezen.atwebpages.com/fiwufepigitizekix.pdfIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_9fd3f035b4a14708be572732e189e6ca.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB6 5704 bytes
SHA-256: 36f25b43ac16f47d0819da36b3535e9456c90f976bcf46b8c8538989f6302ae7
font_01_sfnt_off0000fe18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE18 10780 bytes
SHA-256: 10e0d5062c4061ba219cfec4580d8fd455d8cf0870c7a5488d6449365369831d