Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0f3346bedcb34b…

MALICIOUS

PDF

75.7 KB Created: 2021-04-03 04:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9fd6c2ac881eca55b5f3ccce556ad61f SHA-1: 22cfc6c64c0663171899bfa864fff95e72d46765 SHA-256: fb0f3346bedcb34b3c280cae3a84bc15da2fb14e80d97d320b9bee3ac88e4666
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. The presence of an external URI and an SEO redirector link, disguised as a 'free-download phishing' lure related to school honor rolls, indicates a phishing or malware distribution attempt. The embedded URL `https://jottigo.ru/wix?keyword=northville+central+school+honor+roll+2020` is a primary indicator of compromise.

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
  • 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://jottigo.ru/wix?keyword=northville+central+school+honor+roll+2020 PDF link annotation
    • https://cdn.sqhk.co/kisesawaropo/DjcHIXA/offline_music_app_for_ios_6.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebegawiwa/oinqjj5/58297867062.pdfIn PDF document text
    • http://italiahot.fun/drop_kick_me_jesus_piano_sheet_musickwxv0.pdfIn PDF document text
    • http://infokurs.design/sivujajajiphg0l1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416513/normal_6012ea20bb950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_603a19f533c7a.pdfIn PDF document text
    • https://cdn.sqhk.co/rasadenibe/hahbxBT/new_ringtones_and_notification_sounds_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/Ij6fjfw/nixekudosixibosuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_604a2d0485e5a.pdfIn PDF document text
    • https://cdn.sqhk.co/vojasipi/geuejd6/jotajakaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417670/normal_5fedc9db38332.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/4chbCgd/free_online_music_composing_websites.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_604511ff56d21.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/Yjhiagj/15920491355.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/e74ba8e3-4750-4c92-8952-a42b19367c27/walmart_black_friday_2019_television_deals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58bbc64-81d6-4e81-b852-dd42fa18098b/vishnu_sahastranaam_path_hindi_mai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19059083-66e4-4337-948a-e565250609d3/poduga.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/ch_10_states_of_matter_virtual_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/airplane_mode_games_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/24679686357.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_off0000ebd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD7 5188 bytes
SHA-256: 7284c5e701e01eb6744fbd76e1f1ea1b1c3d1df5e52b6cba51f38f88012b4299
font_01_sfnt_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 10800 bytes
SHA-256: 3575f9760e00d9e7c0f7bd8689b2820331247e3e939030d5848e9e12fd0ccad1

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