Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db890c2db493567…

MALICIOUS

PDF

75.1 KB Created: 2021-03-29 09:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3e7543641a095b27131a06875930a64d SHA-1: c97b368f22f9890861cbfa509d9ce1783a1933c4 SHA-256: 1db890c2db49356737bca5bb0444c3c883d46277ea39d780861dcf94424b25dc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting it functions as a link farm or phishing lure. The primary URL, 'https://jacksth.ru/award?keyword=extreme+adjectives+list+pdf', is likely part of a social engineering attempt to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://jacksth.ru/award?keyword=extreme+adjectives+list+pdf PDF link annotation
    • https://dezitatukuti.weebly.com/uploads/1/3/5/3/135389988/e8fdb095b8e4.pdfIn PDF document text
    • https://sutuvawubu.weebly.com/uploads/1/3/6/0/136055635/tabuvogilo.pdfIn PDF document text
    • https://tezolusubugejel.weebly.com/uploads/1/3/5/3/135314563/wexivo_lirosisiz_xetemuli.pdfIn PDF document text
    • http://fopekoriw.sportsontheweb.net/honeywell_portable_wireless_doorbell_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/gulidepiz/ihWhbge/platform_number_of_53049.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/96796901793.pdfIn PDF document text
    • http://wirajamosilun.22web.org/amla_plantation_project_report.pdfIn PDF document text
    • https://rosififobagas.weebly.com/uploads/1/3/1/1/131164218/031e6a8d.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/sjdjc6k/pitch_tuner_vst.pdfIn PDF document text
    • http://jabekigufu.22web.org/darth_plagueis_espaol.pdfIn PDF document text
    • http://lonemap.medianewsonline.com/aneurisma_cerebral_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/gOiijcz/kicks_kung_fu_movie.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/0b21c663-e127-4ec2-ad95-b7326fc4de4e/under_the_dome_movie_watch_online.pdfIn PDF document text
    • http://novozozoto.epizy.com/xakofasomewadas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1459551-b0f2-4b10-b9a6-30f2444da399/why_does_my_top_loader_washing_machine_smell_musty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e21d471-cbd9-4bc8-8cf6-bd16fb32b01a/operating_system_not_found_sony_vaio_e_series.pdfIn PDF document text
    • http://vifowas.epizy.com/50300190797.pdfIn PDF document text
    • http://xijovapafibowuw.rf.gd/lororimakaxa.pdfIn PDF document text
    • http://tezipibuboxigo.epizy.com/garadedipunorigevogofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38684903-a43f-4cfe-b1c2-b30106d8d153/sarulavog.pdfIn PDF document text
    • http://tudugir.atwebpages.com/78335343869.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_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 5464 bytes
SHA-256: 29ea0deaf2c269957f0485d35a4542612f93d7df08a260094d929cd084e86c1e
font_01_sfnt_off0000fa0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 11208 bytes
SHA-256: 1d8f4d44b8697492c74c671dd03877d0d7b44ab930b60464b01f9fc2d63b4604

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