Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c71f94653f7b9af…

MALICIOUS

PDF

51.3 KB Created: 2020-08-11 02:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eae3be8382bdba1dbf131b79d672c055 SHA-1: 7ef89bf89fa074d4719e0815936e87bc179ca962 SHA-256: 1c71f94653f7b9af08350c90d2486c559989cf57c8e5b83764a0720955b83c8f
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.cc/pify?keyword=al+quran+arabic+to+english+pdf+free+download In PDF document text
    • http://files.donalcox.com/uploads/1/3/1/1/131163943/0e21ac.pdfIn PDF document text
    • http://files.flaentertainmentinsider.com/uploads/1/3/0/7/130775628/2699585.pdfIn PDF document text
    • http://mawak.thesomersetangler.co.uk/uploads/1/3/1/4/131453046/137395.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/bunotunidujubogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/52565942461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9233/7059/files/gulokojonezinedipilewob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/58946207581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/icy_towers_characters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/volokage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3697/8850/files/making_blended_finance_work_for_the_sustainable_development_goals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/wowopokukerefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/53934733327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/comment_amliorer_sa_concentration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/anova_f_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3423/0429/files/o_texto_dissertativo_argumentativo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1089/9624/files/49652457118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/43326821969.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AC 5764 bytes
SHA-256: 3e58bd0db6c6c219a13c4573cf7806990c04fa958e0b3d3fab27731693dfcb3d
font_01_sfnt_off00007640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7640 10252 bytes
SHA-256: 735e88e966420266ad7f8b88bbafd8c209b4616b996ab158be4d6f83296d7ea1
font_02_sfnt_off0000998a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x998A 21720 bytes
SHA-256: 01d4f515749171972362072805556c33e94b732625df4d91280f76444661cc56

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