Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe5d49c59cae2e4…

MALICIOUS

PDF

85.1 KB Created: 2021-05-31 06:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e560cbeca4f09949f233359aaa7a5ed6 SHA-1: d48b6285a9fe88776be1173f1306fbf3549b32d8 SHA-256: bbe5d49c59cae2e49fc2f74b7371f5b319f90ccb9e0ec3f82b97f8a03620a567
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://zajinet.ru/strik?utm_term=adobe+premiere+pro+cs6+tutorial+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402280/normal_604e9ee58017b.pdfIn PDF document text
    • https://jotopivazujofid.weebly.com/uploads/1/3/4/8/134881135/zazurabitos-tojap-luvamevefodiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472479/normal_5ff97da427bd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_6068425564c3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_6049ba6f53e42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458404/normal_60644dd57ef97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fd679dd07aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_606b953dc6928.pdfIn PDF document text
    • https://fuvetozexogix.weebly.com/uploads/1/3/0/8/130874326/264ec681eb6b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_5fdb6eb2736d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_5ffa179dc7551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405184/normal_5fd8a2312af3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465145/normal_604cc8dcd557b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_602c054bd921e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421477/normal_6002ed6bd2e80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbd83aa-cbe8-437c-9dd3-7f48a5e311e3/nancy_drew_tv_show_age_rating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ec3dd0-d095-486c-8845-8630ceb9f8af/c-fern_life_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86e4ab04-eebe-4a46-9cf2-fcf083a2f4ac/nuzotija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65b5296-df38-4d99-895b-74b7a8884065/68015966057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1f8c94-c9fb-4427-a334-19794911f36a/enrique_iglesias_tonight_mp3_song_download_320kbps.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_off00010e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E63 5676 bytes
SHA-256: f0782b0a5b02f8e8ed8716da532da43d620a58f631a8baf3601d8cc687825a36
font_01_sfnt_off000121aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AA 10872 bytes
SHA-256: 4ec6ca1c77775a667fb9959d56e125ab88cb5c1e58029206eb110958c825508b

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