Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f4300e690dd8fb…

MALICIOUS

PDF

78.0 KB Created: 2021-03-23 01:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 86d2fd915b1ca9f016a1a3e571e7f6fc SHA-1: 311710ae75dd26f74a72eb0c02dd42dbab179cf1 SHA-256: 65f4300e690dd8fbaf24f08941ed45a73f034060e4d776770654174e5842b6bf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these external links. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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=zak+smith+gravity%2527s+rainbow+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414339/normal_5fecc7f66b5da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426966/normal_604d9af52cb5f.pdfIn PDF document text
    • http://abistrans.ru/scientific_notation_worksheet_chemistry_answers2fz0k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_605924a0d260d.pdfIn PDF document text
    • https://rebadezoj.weebly.com/uploads/1/3/6/0/136027304/5417758.pdfIn PDF document text
    • https://vonewujin.weebly.com/uploads/1/3/1/3/131380349/3828cdad29845.pdfIn PDF document text
    • http://womenit.space/dj_name_mixer_pro_apk_downloadxigiz.pdfIn PDF document text
    • https://xalanuxezofoki.weebly.com/uploads/1/3/4/3/134309931/widarixafudiwafitik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_603a3f5bde46c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_6056ee02d293b.pdfIn PDF document text
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/zenikijidakotum-rakuza.pdfIn PDF document text
    • http://hurleyshamburgers.com/16714276569mw9eo.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/kukupunopedon/ktvu_channel_2_news_reporters.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/the_impossible_girl_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e61a7997-990e-49a4-872f-bca6b89ac1ae/sparknotes_heart_of_darkness_part_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/poseboxonuviwatusaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1bc5afc-2cfb-4953-82de-cb99668426a4/97639372124.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/29143206858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a830f50-19c5-4dda-b588-eddb33ae8af7/66687570988.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/80817863903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a100106-d941-40c0-a96e-5e42aee1d01e/jubizanodilifixotil.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/73249630845.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/kijuwikutomuna.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_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 5872 bytes
SHA-256: 757a43086c42051463499fbeb0bcdcba89bdeed1c2a2165881a4395900abcb62
font_01_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 12060 bytes
SHA-256: 66d4826f7c0b4523d01a9b5f9027525f463120fb0ee4701b31a9913e27d3ed48

Open this report in the interactive analyzer, or submit your own file for analysis.