Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b48ef34de4d18b…

MALICIOUS

PDF

84.3 KB Created: 2021-05-12 09:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c2fda1e73624b2fbf3585763462fba32 SHA-1: 554ced751212fb4004685cdab044259d1347d9b4 SHA-256: 07b48ef34de4d18b48c073a027ae6521e72a721d05b58251ab13917fc8bc8b3c
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the presence of numerous suspicious URLs and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic suggest the document's primary function is to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/strik?utm_term=how+to+bypass+activation+lock+on+ipod+5th+gen In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366365/normal_5fde355385ec7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5fc6c91b85516.pdfIn PDF document text
    • http://50off.pro/rufixitazatiguj5scyb.pdfIn PDF document text
    • http://7evenrp.ru/39980505204kww1g.pdfIn PDF document text
    • http://montana-media.com/vasikurunaggaydq.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/how_to_clean_filter_on_whirlpool_cabrio_washing_machinenpszv.pdfIn PDF document text
    • http://hookup157.site/jotozuxevebibafubevemetidsh5f.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/hOJvTiH/62342943263.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/jcFjejh/getopekikupomafakux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_6050d587cf632.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/migByhf/hit_latest_bollywood_songs_download_video.pdfIn PDF document text
    • http://tgesheff.xyz/rabikefuwufenuremisaftpn26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404296/normal_60282f1b2505a.pdfIn PDF document text
    • https://cdn.sqhk.co/virapazetif/gigjhNt/kappa_carrageenan_vegan.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/H1g64hi/woodworking_bench_for_sale_ireland.pdfIn PDF document text
    • http://reduslimitalia-official.website/20755934762vofso.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/widuxade/certified_ethical_hacker_course_material.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/the_adventures_of_huckleberry_finn_movie_1939_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/vizio_29_inch_2.0_sound_bar_review.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 5784 bytes
SHA-256: f877eaf4a89349229f5cb623a1ded150ff2a28d7d2f929aa74762cbcdd7d81fb
font_01_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 13688 bytes
SHA-256: 7d6d3fa6a0ab02d9db4fae9847e37c509d5c022a893263f933ad4ab5115470b5
font_02_sfnt_off00012ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBE 16068 bytes
SHA-256: 9e1271d681207e96fe60c94df920a27091a957dc81e2614e9e6235263a34fce6

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