Malicious PDF — malware analysis report

Static analysis result for SHA-256 4490ac433573667d…

MALICIOUS

PDF

81.2 KB Created: 2021-03-20 07:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a0c5a55414d3cc7e35c8737f09bf0074 SHA-1: ad983374013e839ac1750d25bf0a23ea46e7d7a8 SHA-256: 4490ac433573667dc6adb59b6a0f2c12e34dd67a2bdf0c8b757b1745fd1c84e6
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 lure related to 'why does my kenmore sewing machine keep jamming' which redirects to a suspicious URL. This indicates a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://golowaki.ru/strik?utm_term=why+does+my+kenmore+sewing+machine+keep+jamming PDF link annotation
    • https://cdn.sqhk.co/xibumediw/gjccjid/53351134828.pdfIn PDF document text
    • https://cdn.sqhk.co/gamakokub/6Qjilig/norazaroda.pdfIn PDF document text
    • https://cdn.sqhk.co/rekewuneboxu/eaOo0ja/stick_cricket_premier_league_apk_mod_download.pdfIn PDF document text
    • https://cdn.sqhk.co/merodobiweve/6iihihd/zadotus.pdfIn PDF document text
    • https://cdn.sqhk.co/vizefejij/difJKTJ/5108670650.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/hehigis/17554528005.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/vhhWojf/wifi_password_recovery_pro_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxuzoxu/if9NQaP/39161888343.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/bHVKjjm/54301369753.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/biaUHJD/fighting_tiger_liberal_hack_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/haYSjcQ/heroes_of_land_air_and_sea_expansion.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/J5ghMz8/83787497016.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/kovezodepugov/axa_affin_travel_insurance_proposal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/veneer_cementation.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/american_flag_images_to.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/73274061511.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/prophet_sport_lipo_charger_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3df807-0cff-4de8-bd12-daee918b9e2a/3933250280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d52572fb-efab-41f3-a2f5-fa15a92641bd/73853549884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67cef8a5-d508-4b3a-94f8-555eb68437d4/hey_clay_app_deen.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/adobe_ocr_to_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e767b4-ccb4-4d4c-af75-f620f159e55d/bejabozuvurigapejolone.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/mixotivozubizuwamemowub.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_off0000f081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF081 5512 bytes
SHA-256: f9409850417c498c35d1678375439cba9fc4980b230de30d1ea5560f3e4ecb58
font_01_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 10536 bytes
SHA-256: 48cc66d713ed5a3c5abd5e2f6cc074416515d117a04ae91b1ed0bc84286cebf8
font_02_sfnt_off000126f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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