Malicious PDF — malware analysis report

Static analysis result for SHA-256 9945aea7eef52761…

MALICIOUS

PDF

72.9 KB Created: 2021-02-13 23:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9f21846f734d14db4fc7b3d6c09a13c1 SHA-1: 7d0030f0989f47f62e4d862bf77afb2cde9ac8c9 SHA-256: 9945aea7eef527617deb0a51ee0cedf1904e230af538508ae760f49202e84c46
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • 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
  • 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://jottigo.ru/wix?keyword=unblocked+games+download+weebly PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411500/normal_5fdceb1c8cd06.pdfIn PDF document text
    • https://cdn.sqhk.co/pelebitebi/aUiP4ku/29541199957.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/QWPibge/digital_marketing_strategy_mobile_apps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_601c70036a81b.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/EghPFhc/tobopunavu.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/hhdnhei/switzerland_coronavirus_quarantine_travel.pdfIn PDF document text
    • https://sikupawabur.weebly.com/uploads/1/3/4/6/134624396/zikemagi.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/MghkVjg/hidden_animals_picture_puzzles_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/mesodimeduje/XKTx4qb/lmfao_meaning_urban_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/ighbjaU/mijebidajudesekawujexib.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/7604785.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474985/normal_60026612e827f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446489/normal_5fcb6a7a4c99d.pdfIn PDF document text
    • https://cdn.sqhk.co/zezaxemepe/0hdiejb/zimufuxebusijame.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamerowed.rf.gd/digital_advertising_strategy.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_off0000df4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4E 5552 bytes
SHA-256: 78dfea28bb73af93b18de30525bad05c71665601ae1f5aee936e5ef3842c40cd
font_01_sfnt_off0000f23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 10756 bytes
SHA-256: e6bd63703bcd94cb4ef028316e0bda0d386acfc3e7473b4bfc2ffb8f0b7d68ce