Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28eb525faa17b55…

MALICIOUS

PDF

75.1 KB Created: 2021-05-20 05:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 593d5919c8fe11cdc6b02f33a53fc568 SHA-1: 9472bc06b7bdacaaa2379834c638cbdb69763ce2 SHA-256: e28eb525faa17b55bf2027280f0e64c1104df43de772f0eb0bfb676016f44020
184 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains keywords related to appliance repair, which is likely a lure. ClamAV and ML heuristics confirm the malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6727

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.
  • 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
  • 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://druttle.ru/strik?utm_term=how+to+reset+kenmore+elite+ultra+wash+dishwasher PDF link annotation
    • https://xibixijuli.weebly.com/uploads/1/3/5/3/135399677/88473.pdfIn PDF document text
    • https://nujuwededewomoj.weebly.com/uploads/1/3/4/3/134305400/siwaximulef-nipap-bidifito-rutebifumexobon.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/5244216436.pdfIn PDF document text
    • https://febumade.weebly.com/uploads/1/3/4/7/134757335/00ca4.pdfIn PDF document text
    • https://tawugeri.weebly.com/uploads/1/3/4/7/134774142/5964037.pdfIn PDF document text
    • https://kedixomavej.weebly.com/uploads/1/3/4/0/134017366/96ef722d4.pdfIn PDF document text
    • https://refiraledekire.weebly.com/uploads/1/3/4/7/134715744/3427cc1cf.pdfIn PDF document text
    • https://dujikofuzi.weebly.com/uploads/1/3/4/6/134610135/lejulego-jilajobafewiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liguwubore/bhagavad_gita_odia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39adcc5-ef38-4e0b-adbc-28cb64f350a6/latonogifezaxux.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/how_long_is_the_wired_xbox_one_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6c95ac-ff80-4d3a-9f0b-dc043c61460f/jigirufatewinudoniwotebu.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/tipos_de_actuadores_hidraulicos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b97cae-1fe2-47bd-8f88-abf6123df606/sidogojenexeful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccacdf56-8795-4dfc-a328-9b4328e337a6/descargar_dumper_y_jumpstart_2019_mega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b559dfd-a514-4f65-b34c-542b2a62a843/80556934699.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/snow_white_whitening_gel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2068e8c0-00c7-4964-92ab-866ba7320526/levojowomatori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18db0702-86e5-48bd-9f0e-0a531ca09bab/what_does_auld_lang_syne_means.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b7d6c7-3406-4645-84e9-1c1839e0b0c1/rita_hayworth_and_shawshank_redemption_book_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52fef421-10ca-4ef9-a6f6-0dcaf01889e5/godonaxevobe.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/rakowivi.pdfIn 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_off0000f68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68F 5064 bytes
SHA-256: 644c2a1e2a0280df2b76d0da5c53b10e68a0fc04678ad606ac6948ec81cca0cd
font_01_sfnt_off00010798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 10184 bytes
SHA-256: 7041b7c238cacb9156593128a477018cf0c06095e289f92f745327d49000bcbd

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