Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ac7602b3b94505…

MALICIOUS

PDF

44.9 KB Created: 2020-10-25 00:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 9471c7f3e72296ee43977d4d869afd8b SHA-1: b4a65d32757b5b3ecaa71815197b65ca48e84ecf SHA-256: f7ac7602b3b9450551b7145b7fefa14cd9add97ecdaa1ba093f866aef5613c7a
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://cctraff.ru/pify?keyword=stick+war+legacy+mod+apk+no+cooldown In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/e850990e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383571/normal_5f91b71f25530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f8dbf204e07d.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/4c9abb978.pdfIn PDF document text
    • https://fukobararusi.weebly.com/uploads/1/3/4/4/134404541/2f91eece.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/3cb113af6.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/waxodo-duguwena-revugoraf-waxogili.pdfIn PDF document text
    • https://jikajulimag.weebly.com/uploads/1/3/4/3/134319013/3151b9f.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/1/0437/8047/2984/files/hercule_poirots_christmas_agatha_christie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0078/1759/files/lotosiwexelovov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3201/8585/files/tepozajaduxiduge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1727/1453/files/forex_calendar_widget_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7827/0628/files/72218948149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2565/0592/files/is_there_an_airdrop_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1040/0153/files/23803892819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/phantasus_arno_holz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5587/3190/files/business_development_resume_keywords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/best_quality_kratom_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2543/1709/files/nose_job_before_after_front.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9128/0277/files/44196456019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/duc_phuc_truoc_phau_thuat.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_off00006f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4D 5576 bytes
SHA-256: 2e41d07864581896b44012f6624669c05ab01d250d240aedae9c457ec5ea0265
font_01_sfnt_off0000824c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824C 10560 bytes
SHA-256: 1767ce624dff1a342625282b3979f6aad0cd9c9a1ed5c7be2f93194f120d6565