Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e30563bd9701ce0…

MALICIOUS

PDF

110.6 KB Created: 2021-03-22 23:18:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f39af17ed642acdc57feaf7ee354386e SHA-1: 0cf222568a238bb95df2beab189191310394aa29 SHA-256: 0e30563bd9701ce0bbf47761c651a7b24977d51174f4ce508e57538e34e412a0
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, with one heuristic specifically identifying a 'PDF link farm'. The presence of these links suggests an attempt to manipulate search engine results or redirect users to potentially harmful content. While no scripts were extracted, the PDF structure and link farm heuristic point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=apk+kodi+18.5 PDF link annotation
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/3483395.pdfIn PDF document text
    • http://paxawujaxoda.22web.org/63523008146.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/0hhuHgj/labefobaxi.pdfIn PDF document text
    • https://mokomowu.weebly.com/uploads/1/3/5/9/135969792/1288b387bcf454.pdfIn PDF document text
    • https://buvapubadoloj.weebly.com/uploads/1/3/4/2/134265521/dakep.pdfIn PDF document text
    • https://nasaxedinevizuv.weebly.com/uploads/1/3/4/7/134759800/75e54.pdfIn PDF document text
    • https://cdn.sqhk.co/bumajanivosi/eggp180/getudedosarijitugim.pdfIn PDF document text
    • https://cdn.sqhk.co/toledexipez/RKhjBge/arma_3_altis_life_mining_guide.pdfIn PDF document text
    • https://fuvetowonilup.weebly.com/uploads/1/3/1/3/131383456/00cc0.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/sbUijhe/sunrise_smart_tv_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/vutabopi/hgrhgsp/sakelugalamexud.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/sizabo/the_river_church_tampa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9908ae27-6360-4d19-bad7-e29ea0e77daf/13436844213.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/free_edit_crystal_reports_rpt_file.pdfIn PDF document text
    • http://sakikuzugodo.rf.gd/28098264616.pdfIn PDF document text
    • http://dedamedasobime.epizy.com/84342239291.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/react_js_ecommerce_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/katufotubobunesenobegubok.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/craftsman_10_miter_saw_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd778e74-d6ae-49d0-a449-7bf3194b9764/what_are_the_7_stages_of_human_development.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_off0000e3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EB 49080 bytes
SHA-256: 5bc8f4fe5b6065f1d1c6001c8cc937db46b8310eeebf9d170e167e80944c8a43
font_01_sfnt_off0001790b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1790B 4892 bytes
SHA-256: be07ff5461cc026184342a7dc86f97a75b8f811b05673e07831a5169224929ee
font_02_sfnt_off000189dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189DC 9688 bytes
SHA-256: 210610d39099fdd87d2c03936305a0a9d92fb512c4401c384474cf9c0e32f992

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