Malicious PDF — malware analysis report

Static analysis result for SHA-256 bead12f8a3e127b8…

MALICIOUS

PDF

74.6 KB Created: 2021-03-18 04:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d93308cd87e516ae988da8a2622e6776 SHA-1: b81c7860460146dd44792dfbf47ce4a5f6b1bca8 SHA-256: bead12f8a3e127b873053a90648aba52e190ebf7120f48b74c493fa0faa0d9a8
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://maypoin.ru/strik?utm_term=how+do+students+use+onenote+class+notebook PDF link annotation
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/1972041.pdfIn PDF document text
    • http://bbflowers.net/56480448259nafpc.pdfIn PDF document text
    • https://fazajamol.weebly.com/uploads/1/3/2/7/132740605/3e5f21316c16.pdfIn PDF document text
    • http://giftcard-sale.store/degokekajarujovivufijewifkmod.pdfIn PDF document text
    • http://kukushpa.fun/96676994739e9320.pdfIn PDF document text
    • http://oneitstore.pro/81698807323ebbua.pdfIn PDF document text
    • https://nebunabimumebu.weebly.com/uploads/1/3/4/4/134480995/tafoso.pdfIn PDF document text
    • http://job-finder.space/consultancy_services_website_templatesjbf5b.pdfIn PDF document text
    • http://profaudit32.ru/xuzediwinijet50dte.pdfIn PDF document text
    • https://xetetikagidol.weebly.com/uploads/1/3/5/3/135308020/1036660.pdfIn PDF document text
    • https://birinubawode.weebly.com/uploads/1/3/6/0/136026057/63222023.pdfIn PDF document text
    • http://avtoshtorki.shop/2nd_grade_english_textbookzphdr.pdfIn PDF document text
    • https://xejepelurafuxiv.weebly.com/uploads/1/3/4/8/134887300/gixofutolevodar-tageruz-timexeni.pdfIn PDF document text
    • https://tedalemom.weebly.com/uploads/1/3/5/3/135398197/3060210.pdfIn PDF document text
    • http://bbflowers.net/pdf_oxford_dictionary_english_to_hindi88gex.pdfIn PDF document text
    • https://fezagigix.weebly.com/uploads/1/3/0/8/130813643/5169504.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/sojebelevenex/calibration_procedure_of_ph_meter.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/soxakobesesefesikofo.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/canada_food_guide_recommended_sugar_intake.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/mobiliti.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/hanuman_cartoon_hd_images.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/83257623426.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_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 5096 bytes
SHA-256: aeca9ff0827b1df03c1bebcd6de3d7f7d8046f74b5fb011de6aae76c1e9cdf9e
font_01_sfnt_off0000f9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 10184 bytes
SHA-256: 323519d6b5c46aad928cafad9986b0dc0aeeb1e605b936b5384abe185ed8989f

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