Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfe2f38b438a31f…

MALICIOUS

PDF

90.1 KB Created: 2021-04-08 02:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7fafda4c4fc7cb8600cf03dec71312 SHA-1: d82fe7aad6121194f1d793fa2ab03f1a4089bbd2 SHA-256: fdfe2f38b438a31f1bac58be89f8bb833a0eb00396872a85b32e27a6077e8d30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it's part of a link farm or phishing operation. The embedded URL `https://resalured.ru/wix?keyword=not+dead+%2526+not+for+sale+a+memoir+pdf` is a primary indicator of malicious intent. ClamAV also detected this file as `Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0`, further supporting its malicious classification. No scripts were extracted, but the structure and URLs point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=not+dead+%2526+not+for+sale+a+memoir+pdf
    • https://cdn-cms.f-static.net/uploads/4384851/normal_60600ddc19224.pdf
    • https://jawutasujo.weebly.com/uploads/1/3/0/9/130969833/d4890468e2.pdf
    • http://yewes.fun/libros_de_historia_prehispnico_de_mexicoz9d69.pdf
    • https://cdn-cms.f-static.net/uploads/4366347/normal_60482f9901e2e.pdf
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/mewopizisinorul.pdf
    • http://menbp.online/outlander_book_1_hardcoverjin6o.pdf
    • https://static.s123-cdn-static.com/uploads/4497666/normal_5fe181156c39f.pdf
    • https://cdn-cms.f-static.net/uploads/4374374/normal_605126d54af83.pdf
    • http://fotograf-na-svadbu.moscow/37373956312dbhid.pdf
    • https://kejarokelevu.weebly.com/uploads/1/3/5/2/135297316/letoba.pdf
    • http://teksol.xyz/what_is_a_briggs_and_stratton_enginew24er.pdf
    • http://belkwigs.com/71407984632uzjpv.pdf
    • https://toxafowusolele.weebly.com/uploads/1/3/2/8/132815148/2587956.pdf
    • https://cdn-cms.f-static.net/uploads/4475987/normal_60650d0d7125a.pdf
    • https://zasawebisev.weebly.com/uploads/1/3/4/8/134865024/jekaze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4eca8f06-20eb-4fbf-90c5-2c08c7a19818/logitech_speakers_z623_vs_z625.pdf
    • https://uploads.strikinglycdn.com/files/206ee674-ec8e-4cf5-9cdd-5b31376565c3/dodge_ram_uconnect_update.pdf
    • https://uploads.strikinglycdn.com/files/431cbedf-981f-43c3-98f5-c3ba2e0c62e3/jefulurakunidewel.pdf
    • https://uploads.strikinglycdn.com/files/96b9c27f-a1ee-4264-bca8-20bdd5d4b43c/bowovalozojur.pdf
    • https://uploads.strikinglycdn.com/files/1d0570f7-f572-4b4a-be26-bfe1e024494d/32833560304.pdf
    • https://uploads.strikinglycdn.com/files/c3e0c55b-73fd-4f5c-8cdb-93fa6b1d4d12/xofafurise.pdf
    • https://uploads.strikinglycdn.com/files/53028862-d858-452b-8ac1-5c5d32b85390/zegimusifasukagobovovaf.pdf
    • https://uploads.strikinglycdn.com/files/ddd9ecd0-d3ba-4add-9942-01cb9c107905/being_in_love_osho.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127b7.bin
ba76c145f8112ba9dfc5447d542635954b6218c7fe523ff6439b5314b8fa8b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127B7 4484 bytes
font_01_sfnt_off00013709.bin
758c42f6b1e8396cde0c71bac81c0bd361dcc5f45baff9cf1ad6ddc35a8ecd47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13709 10680 bytes

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