Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9f2f868a8544c1…

MALICIOUS

PDF

79.3 KB Created: 2021-04-22 11:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1295ae0fc4371377923e49b8eea6ed44 SHA-1: c821b253baa9b1585a90410498d7d7111e9ab571 SHA-256: 2b9f2f868a8544c1b035269791ccfeeb74ae0698b19e8c7207db328b46c3cf93
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as a phishing trojan by ClamAV and a machine learning classifier. It contains an embedded URL that redirects to a site related to the ketogenic diet, likely serving as a lure for a phishing campaign. The primary malicious indicator is the external URI pointing to a suspicious domain, which is characteristic of phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=how+to+do+cyclical+ketogenic+diet PDF link annotation
    • http://kakolamilasaru.medianewsonline.com/quantitative_aptitude_questions_and_answers_for_ssc.pdfIn PDF document text
    • http://babbieshop.ru/bhole_nath_ke_bhajanp003d.pdfIn PDF document text
    • http://ipoteka.net/el_monje_que_vendio_su_ferrari_sinopsiswall8.pdfIn PDF document text
    • http://lazakefezives.mygamesonline.org/programma_elettorale_centrodestra_2020.pdfIn PDF document text
    • http://eroganoficial.site/a_christmas_carol_short_scriptj24fg.pdfIn PDF document text
    • http://persequenteamsohbet.com/nokuloiw47s.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/fedojigudaj/86680620591.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/gemorumuriposeze.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/73109596893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c55c0fe-0a9d-4204-97a2-7290bb6a88cf/57146745888.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/french_translation_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e6053e-eaaf-408f-bca4-77d4896b915f/93011280010.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/bazedilinisapolagabomusom.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/king_root_apps_for_android.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/camera_scanner_to_tapscanner_premium_v2._0._47.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/organizational_behavior_case_study_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/email_template_html_code_generator_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a83d86-f9ff-47e0-bb06-b7c21b367b34/g_l_a_mg_dl.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/janatha_garage_movie_ringtone_free.pdfIn PDF document text
    • http://wuxosalilujaza.atwebpages.com/libro_autometrica_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9749194b-cbcb-4240-a21f-752e408baea8/scarlett_2i2_review_gearslutz.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/netflix_apk_cracked_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/jasperreports_maven_dependency_6._0._3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d76972d-e8f2-4432-ab88-90b8fca6c722/29157774760.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/how_does_family_feud_canada_work.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_off0000f839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF839 5052 bytes
SHA-256: 313da2ad3802cb04f53b98d8fb3cfd0ee50fdbfc30310a2281fa00b8e2a8814b
font_01_sfnt_off0001099b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099B 11240 bytes
SHA-256: 2327deba899c7b900591666418d275f94ede654f16ce07a0095ba0d91cd7a6b0