Malicious PDF — malware analysis report

Static analysis result for SHA-256 392b6c8f88197588…

MALICIOUS

PDF

73.2 KB Created: 2021-02-23 10:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ad373c4b3a2546afb93515d9c3299792 SHA-1: bc3d9519f59b45a3d828bd0228db3af322ccd064 SHA-256: 392b6c8f881975883650cd7ea6328c4459543b40f0a019c16d4399a7b83086a5
136 Risk Score

Malware Insights

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

The PDF file contains a lure related to using a Bissell carpet cleaner, which redirects to an external URL. This URL, along with other embedded URLs, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=how+to+use+a+bissell+carpet+cleaner+proheat+2x PDF link annotation
    • http://zazonowipudu.66ghz.com/53945416184.pdfIn PDF document text
    • https://cdn.sqhk.co/kovajivika/Gjgigmw/wifefitixigabamadaf.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/je8gPVO/giwogulagetukegiluriruvo.pdfIn PDF document text
    • https://cdn.sqhk.co/jasojime/lpihYif/dead_wallpaper_photo.pdfIn PDF document text
    • http://xixevogaxazi.22web.org/taco_bell_chicken_power_bowl_calories_without_guacamole.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/LQjjzhj/halloween_town_series_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/vvjeU97/visiwejunimije.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/gogoxowiniza/motorola_sb6121_comcast_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/golden_slumbers_sheet_music_jennifer_hudson.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/battery_tender_4.5_amp_supersmart_battery_charger_and_maintainer.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/functions_of_management_information_system_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/the_enlightenment_worksheet_icivics_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/android_browser_stop_auto_refresh.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/10790757045.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/natole.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/30397759620.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/byju_s_app_apkpure.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_off0000e093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE093 5412 bytes
SHA-256: 4dca0266c1ce6c2f221d38e71786f1410c5283d8836877166faaebfa46dcc9f2
font_01_sfnt_off0000f308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF308 10596 bytes
SHA-256: 0043ede63a29a3b7705bd064d38cddb776ebdb3afe5c357d4d1751ccecc59722

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