Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f48bd0e63fa974…

MALICIOUS

PDF

75.6 KB Created: 2021-01-30 22:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dd2eed6e63f1b9a970d97c99a4ae8270 SHA-1: 11bb981ff9fd000fca4cf42c5f851a2958315bad SHA-256: 36f48bd0e63fa974331c0426fe349c701014eb84257f6faae8292d57a865e535
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The presence of ClamAV detection and ML classification further supports its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafffi.ru/wb?keyword=clash%20of%20the%20olympians%202%20game PDF link annotation
    • https://peniseguj.weebly.com/uploads/1/3/2/7/132712198/8537487.pdfIn PDF document text
    • http://talkme-news.info/27439374974nrrzy.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/amjbjdY/duterte_fighting_crime_2_apk_download.pdfIn PDF document text
    • http://lnstagramverifycentre.com/nigavofisikodivonam384u2.pdfIn PDF document text
    • http://nizagose.66ghz.com/94111235980.pdfIn PDF document text
    • http://milky-rp.space/69013696719sunxj.pdfIn PDF document text
    • http://copyrightreports.com/1972oie1e.pdfIn PDF document text
    • http://linza.media/coupon_code_for_amazon_prime_membership62feg.pdfIn PDF document text
    • https://peziwavadeba.weebly.com/uploads/1/3/4/3/134313506/ditulu.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/fhjhdhb/masterindo_petshop_bantul_daerah_istimewa_yogyakarta.pdfIn PDF document text
    • http://strapslap.online/nuvover4mj1l.pdfIn PDF document text
    • https://fazidojerax.weebly.com/uploads/1/3/5/3/135328618/pibukadibuv.pdfIn PDF document text
    • http://vekvelo.ru/67458494276y33a5.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/jipowumat/pugibolowufe.pdfIn PDF document text
    • http://wikilupari.epizy.com/lozejukomovibasi.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/list_of_social_media_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/46695197180.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/exercise_simple_present_tense_with_answer.pdfIn PDF document text
    • http://pusevim.epizy.com/chomsky_normal_form_steps.pdfIn PDF document text
    • http://ruguwusizomu.epizy.com/backstab_apk_obb_all_gpu.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_off0000dbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBB 5356 bytes
SHA-256: 6e3e6e5ca4fb6c1b1128c133a4b3398ea775f91a3c5dce9516c910469e664720
font_01_sfnt_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 21652 bytes
SHA-256: ef4febfa5fbd71e1f60162267fadf2e8c9f99b015f811b5830079dd953b83fb0

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