Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6009d319bb66b9c…

MALICIOUS

PDF

93.1 KB Created: 2021-03-15 08:21:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1e00fd6b6eeeeceea241874e858c4e80 SHA-1: b2401bd27a1b185ffc7997310ec351baa964a44b SHA-256: c6009d319bb66b9c477aee823a8b0c8dcf9801370f59f369fb91c5c65762d409
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO redirectors, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://dugedepap.ru/strik?utm_term=what+does+prayer+beads+mean PDF link annotation
    • https://cdn.sqhk.co/perajomipe/Z3jgCJN/82863348551.pdfIn PDF document text
    • https://nazisedisan.weebly.com/uploads/1/3/1/8/131871674/cb2341b20c0cb7.pdfIn PDF document text
    • https://tikiruwilowu.weebly.com/uploads/1/3/1/1/131163793/9481900.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/3212715.pdfIn PDF document text
    • https://gaxurorilapuw.weebly.com/uploads/1/3/2/3/132302857/gumebexunuf_muzofosi.pdfIn PDF document text
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/7c44a52b5ec5.pdfIn PDF document text
    • https://xuxixoxeniti.weebly.com/uploads/1/3/4/5/134585484/kemomidiferasijiv.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/ejercicios_de_mru_mruv_caida_libre_y_tiro_vertical.pdfIn PDF document text
    • https://cdn.sqhk.co/fegibidizog/m9hg0mu/easy_birthday_cake_recipes_for_beginners.pdfIn PDF document text
    • https://nojoxarojip.weebly.com/uploads/1/3/0/8/130813855/21e948f5b2bf026.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/hejbc54/silicon_city_ward_number.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/phgSxib/battle_arena_toshinden_3_zola.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/wing_chun_hand_forms.pdfIn PDF document text
    • https://cdn.sqhk.co/fowujizul/1ihjhhi/51852892732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/wewiro/rafinifegepibogire.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/tedux.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/fejatuwigufekumu.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/mogamunadovotuxifefer.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/ielts_writing_task_1_band_9_pie_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/petty_cash_book_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/product_catalog_powerpoint_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/zagekazurewuvufe.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/interstellar_main_theme_piano_sheet.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
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 6324 bytes
SHA-256: b50b159690e1b4fb0c042fee2f1a2db0a09bcfeaba275ed4be949e0435aaf63c
font_01_sfnt_off000112ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AE 5420 bytes
SHA-256: f649b43adc3f3d438f7307bfa09d8f3e19c52f8845b0df9dc278f7c94b3bc74a
font_02_sfnt_off00012502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12502 12504 bytes
SHA-256: b8b357c70c57fd2c1aeb41c2bbbf4d44e67de56161c7c6c6cd826bb6e497f458
font_03_sfnt_off00014d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D43 2492 bytes
SHA-256: 4caec849919531d0c4723bf4d3c16b7e18f7a9cf46faaa60b77c38964e0b3ea7
font_04_sfnt_off00015787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15787 4496 bytes
SHA-256: bf077336a9eab47ebc54924c14d3572bb04034dbc9288cadaef33d9988238c01

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