Malicious PDF — malware analysis report

Static analysis result for SHA-256 af22ba109937b23f…

MALICIOUS

PDF

74.0 KB Created: 2021-01-27 09:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: b70b5d088d6932e6d6c8707343210bb2 SHA-1: c7f82c6bb0084ebe892962f6aec923157ecc9914 SHA-256: af22ba109937b23fd26e65ef2e514c44f55f987044ec4305353eae0f11d4c1f2
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=draw%20me%20a%20star%20art%20activities In PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_600284c43c345.pdfIn PDF document text
    • https://lafuxekezijunu.weebly.com/uploads/1/3/1/4/131406487/c6b00304b4103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487622/normal_5fe03bb527993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_600c832fafbec.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/5KzgjiW/rise_of_kingdoms_garrison_commander_pairing.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/egdNzih/70376306685.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_6005dd6c33c94.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/bIhhjKo/olympics_2024_events.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/hanok7U/battle_bears_zombies_download.pdfIn PDF document text
    • http://sreview.online/dolphin_emulator_32_bitcsxuz.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/pilazi/sociology_upsc_optional_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/boucles_violettes.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/2654694535.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/acutronic_fabian_manual_espaol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD863 3496 bytes
SHA-256: f7e7051b09b9166ddab27bf02b3692ac0b05f446c2994e8d4c196c02fef8382f
font_01_sfnt_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 5064 bytes
SHA-256: 22d25ce5e626ba7194e299c1dd17deeede4c863a22b04fbe244393df98c587f2
font_02_sfnt_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 10680 bytes
SHA-256: d18ba80716b778ae0684fd9302e7f0b2f6822834f491738507190b4b81ac3816

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