Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea4dfa135266581…

MALICIOUS

PDF

83.0 KB Created: 2021-05-18 03:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01cce7ff4b68a34cf0e5971d288448b3 SHA-1: f5b85e96159a746b271ee7f8b7d9c249f8467e40 SHA-256: 2ea4dfa1352665811889c0bcdbae17d6a24e4fe7303fb35cd39f604c7e994ebb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/wb?keyword=promaster%20nighthawk%20review PDF link annotation
    • http://pabukelib.66ghz.com/jimopuzuso.pdfIn PDF document text
    • http://bibilewixan.iblogger.org/hypertriglyceridemia_induced_pancreatitis_case_report.pdfIn PDF document text
    • https://jofomozali.weebly.com/uploads/1/3/5/3/135387403/jimesoderaz-gisixunofukites-sinom.pdfIn PDF document text
    • https://lawebigatu.weebly.com/uploads/1/3/1/4/131453175/3484789.pdfIn PDF document text
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/29daee451.pdfIn PDF document text
    • https://bumogekatagod.weebly.com/uploads/1/3/0/7/130776321/1902358.pdfIn PDF document text
    • http://rawefasulu.iblogger.org/binary_numeral_system.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ditiruz/jakiwiwekawufef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1940207-9bf9-4f88-abd9-e5ace5766e35/5096972979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4181bc48-06dd-45e1-bfc6-817f06104ced/wendell_berry_the_unsettling_of_america_summary.pdfIn PDF document text
    • http://jowatazurusu.epizy.com/wawevizonupub.pdfIn PDF document text
    • http://fukasutatota.rf.gd/adverbs_of_frequency_exercises_with_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5027b4b5-ef38-4e06-95fd-05b0151cccfc/how_to_fix_mouse_scroll_wheel_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/fukosa.pdfIn PDF document text
    • http://vifewupanog.epizy.com/87652249528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c302b85-2892-4af8-95d9-642f5d6d3ca0/64398793830.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/love_wallpaper_to.pdfIn PDF document text
    • http://zexilejogela.epizy.com/air_hogs_millennium_falcon_quad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b975a611-fde5-4802-92f5-3cb13b05fcab/top_seller_pioneer_ddj-sb3_serato_dj_controller_with_pad_scratch.pdfIn PDF document text
    • http://bapitibob.epizy.com/numeros_en_ingles_pronunciacion_y_escritura.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/prayers_that_availeth_much_demonic.pdfIn PDF document text
    • http://xomewipasi.rf.gd/eficiencia_y_equidad_economica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbcc9f2-85bd-46bc-b493-d647fefe9849/the_young_elites_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef62f2f-b692-4426-9f53-e820340ea7a4/39902071932.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_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 5072 bytes
SHA-256: da169fe2a3f27a0a9746a432b60dcbda30984ee5e3e522374e848570eb08ccef
font_01_sfnt_off00010902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10902 10956 bytes
SHA-256: 22f426e3093052e7c0dd7cd2efcea24ae3b999941bf35fa342cc3aa828fd1f41
font_02_sfnt_off00012e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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