Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7333fc3e0fd9cf…

MALICIOUS

PDF

37.7 KB Created: 2020-10-30 09:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 7cb1ddb7b7bf3d7aa76bac7887851afe SHA-1: 07a9431b1e68479851495f16a644ab877d54344e SHA-256: 3e7333fc3e0fd9cf4f912bdf4cb12d63ab501ac3700e9b4469387e86156f4ef8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=don%2527t+hang+up+lyrics In PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/kudibaripesevomiki.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/3798035.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/ligigip.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/9740082.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/fatikonavori/66207393092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0773565-53b2-4887-9526-39d603c7131d/the_help_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c234ae-9c44-489c-b85f-bc4206149b0c/votupoxepatuzigobibuw.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/automatic_bottle_filling_system.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/14270396771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/7367003363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba6adfd-583d-4939-bc9e-3ecbd20cd94b/tarepimitifeg.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/sobiriropu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8534/1876/files/hotel_artemis_imdb_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1f2f3f-a4fe-4b1e-b53e-fe74bbe93e74/83663968619.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_off000053a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A7 5332 bytes
SHA-256: c35090e153e0b04bf2d281fa4988b90c0c89cd81d47eefa1fb14c41ecbbd2457
font_01_sfnt_off000065dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DC 10572 bytes
SHA-256: e65a34b5604ef0bf5d3b87dfe1588c2a6c54d70a8815590bde6907a14a4b71a6

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