Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c3ba726916d051…

MALICIOUS

PDF

67.9 KB Created: 2021-02-16 01:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6f81ce080fac2bd18cbe725e26864676 SHA-1: 7c9814833e942ae53eb1a649964a356511cf067d SHA-256: f0c3ba726916d0516a1b5b53f4b7d155d2f20a4b33b9575d91988f112f0be8d2
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/wix?keyword=peggo+apk+android+2.3.6 PDF link annotation
    • https://doguxugufini.weebly.com/uploads/1/3/0/7/130739878/c02922.pdfIn PDF document text
    • http://legrand-spb.ru/laromazerokevark6q1f.pdfIn PDF document text
    • https://vidijizuv.weebly.com/uploads/1/3/0/7/130776341/7caa9c302eab4.pdfIn PDF document text
    • https://kofijowuz.weebly.com/uploads/1/3/4/4/134446653/nuxez-dukoz.pdfIn PDF document text
    • http://premial.su/drawing_curved_lines_in_microsoft_wordnluoc.pdfIn PDF document text
    • http://steel-lipetsk.ru/29598653413gp1rn.pdfIn PDF document text
    • http://merishwheelrecords.com/zefibozopekxkw0y.pdfIn PDF document text
    • https://tuduzijusesuzi.weebly.com/uploads/1/3/1/4/131406801/fekuzeladali.pdfIn PDF document text
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/d4a8e6718eeaa66.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/bazibeniwibu_juzamemafet_zukolatonisopu_mosukixirerek.pdfIn PDF document text
    • http://vbruti.site/aspect_ratio_changer_apkasjh9.pdfIn PDF document text
    • https://sebumowuvuxeluz.weebly.com/uploads/1/3/5/9/135962316/givujoperobalep.pdfIn PDF document text
    • https://revogofoti.weebly.com/uploads/1/3/3/9/133999152/fekak.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/xozeb/45685682257.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/balloon_payment_note_form.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/audio_recovery_software_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/abba_dani_soku_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/execute_stored_procedure_using_jdbctemplate.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/jio_caller_tune_app.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_off0000cdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBE 5464 bytes
SHA-256: c80f31379a9c5e555f7bfe87a21c4e2630dcce6e7f3df823ccc433e181f8025d
font_01_sfnt_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 10008 bytes
SHA-256: 505b64222aa2e00c3aae3a83b24f8a05ed27d6da523e1a60bfada4323cecf22f