Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed5101ef41b6394…

MALICIOUS

PDF

85.5 KB Created: 2021-03-15 09:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 525ae55040922ad0155ea89095cb638d SHA-1: d294c91daec4c412f824f9a780533c687a514d67 SHA-256: 4ed5101ef41b6394da36500210af3154ea023960803b92effaed673b55c0903e
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a high-confidence heuristic firing for a phishing lure, specifically an image linking to an SEO redirector for a fake download. The embedded URL https://xajibur.ru/wix?keyword=family+farm+seaside+mod+apk+unlimited+money strongly suggests a phishing attempt to trick users into downloading unwanted software. While no scripts were explicitly extracted, the PDF structure and the nature of the URL indicate a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xajibur.ru/wix?keyword=family+farm+seaside+mod+apk+unlimited+money PDF link annotation
    • http://memisada.mygamesonline.org/how_to_adjust_height_on_herman_miller_chair.pdfIn PDF document text
    • http://sazaleve.22web.org/tui_sutherland_wings_of_fire_series_order.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/philadelphia_transit_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462697/normal_60385a2dcea96.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/wexobolusafizoviz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474176/normal_5fec2f0ab2c30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458388/normal_5fe00fe646560.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/8270093421.pdfIn PDF document text
    • http://degifutuv.scienceontheweb.net/44544273343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_602224f816c0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457272/normal_60065c8b5ddf7.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/tumuzu/job_interview_question_and_answer_sample_tagalog.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/after_effects_cs6_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/iron_ore_crossword_answer.pdfIn PDF document text
    • http://vusizudufekope.epizy.com/tadowadedikafuwer.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/99068722490.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/84296113128.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/how_to_develop_mind_power.pdfIn PDF document text
    • http://fidikaxano.myartsonline.com/dell_1704fpt_monitor.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/39546176006.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/cpr_guidelines_1980.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/floor_press_exercise_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 5308 bytes
SHA-256: b2b6be94ef378ffdfff6180024baeb99e043f76d543292dece7bce0ee0e4ed60
font_01_sfnt_off00010df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF9 10664 bytes
SHA-256: 3f0debe300e999d2de9cb7ae0af2ae1f0e6ed6daaeaf4b4ae1f280fc37f06679
font_02_sfnt_off000132c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C1 16200 bytes
SHA-256: 077e56cd0fd9f04032d50b271b011b110066dc4ea68c364bd52d9d344075126f

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