Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f942d280360e03…

MALICIOUS

PDF

78.3 KB Created: 2020-12-11 02:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d67a05e64e5773fbed4e4b1488348f75 SHA-1: b40a70a96c32af47049dfa193a90d6c6e76869d1 SHA-256: e0f942d280360e03e56769a9893ecbf8685d018a7ea2149fc018ef392e3dc0af
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high number of embedded links, with critical heuristics indicating it's a redirector and a link farm. Several URLs point to known malicious or unknown redirectors, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ggtraff.ru/aws?utm_term=sample+argumentative+article+pdf In PDF document text
    • https://dibozavo.weebly.com/uploads/1/3/4/5/134501923/3f0990839a.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/zogemumofawupozikove.pdfIn PDF document text
    • https://zexiditituluw.weebly.com/uploads/1/3/4/7/134734655/mibapemagizixine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423155/normal_5fbc280acc721.pdfIn PDF document text
    • https://mesirurot.weebly.com/uploads/1/3/4/7/134706751/xaduzitobenat_tigizan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_5f925aed872bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc14b808139af037647f366/t/5fc78fc7b2fa4660c8d7e8ed/1606913991430/radio_viva_fm_104._7_en_vivo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21e2fce462bc8c0024/t/5fcc6f1f920f47545b8bb7ab/1607233311967/kivajelederikovow.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf4129d7936484053e642/1606284308233/coc_download_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf27f1972c46e3c6479eb/1606283904929/tableau_your_data_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/lojonurirulef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1067fcc1-0c03-47d9-b4d3-360c71afa61b/maze_runner_book_series_order.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/dynamics_365_licensing_guide_january_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce086f8a652741489a4cb6/t/5fcf6ee001eaf4591e29ee11/1607429856599/65643285795.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/pituitary_gland_histology_guide.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_off0000f4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 5460 bytes
SHA-256: fc5a95b656726152dc6a101d52f60081179c58cb20f934ca9c44856e0952668b
font_01_sfnt_off00010755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10755 10868 bytes
SHA-256: 9dff53c4c9868f832b212e791294c7955e02d761182f7dd3416b8551bb3d5809

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