Malicious PDF — malware analysis report

Static analysis result for SHA-256 059499d1a93db8ff…

MALICIOUS

PDF

77.9 KB Created: 2021-03-23 01:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b2a77d225d8f9237d911dc42f4bc6c4c SHA-1: 9519bda3ac9da121770c2a450cc8a70e9ccf9652 SHA-256: 059499d1a93db8ff06fbe7a6807a4cf5ae72005f196138cf6af5e275faecd603
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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=2020+budget+planner+australia PDF link annotation
    • https://cdn.sqhk.co/nosamese/jiaij2q/zavowijimamele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372983/normal_600001704e5c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417039/normal_6033ae944de00.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/qhd6qhe/abyss_horizon_english_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/WL6rx5A/66937348569.pdfIn PDF document text
    • http://moreprodukti.com/dd_3.5_mago_incantesimicnwqb.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/punedakarireberiz.pdfIn PDF document text
    • http://hookup756.fun/86679661099r0lk0.pdfIn PDF document text
    • https://cdn.sqhk.co/xifusajexom/jigcheP/wedokexa.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/pukekiwarewepejora.pdfIn PDF document text
    • http://hookup668.site/lagofuvivovivexumobiralujcrfl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529095/normal_601229143879f.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/hbRo2gj/woxiraguroxedax.pdfIn PDF document text
    • https://cdn.sqhk.co/faresawuf/ibLvDNw/bipomedosaxafogu.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/7GhjLSS/kujilokivapulagojulenov.pdfIn PDF document text
    • http://hiziryigit.online/minolu1be4e.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/40458861168.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/jjiwyha/syberia_3_walkthrough_part_24.pdfIn PDF document text
    • http://remont-pc.website/software_tester_resume_for_fresherkdv7x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kojuvurapamox.myartsonline.com/nizidozepumudibuz.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/swiffer_wet_jet_nozzle_not_spraying.pdfIn PDF document text
    • http://benamow.myartsonline.com/vobonozumolezi.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_off0000f309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF309 5444 bytes
SHA-256: 6b628b5e6bee756ee3153f697ba4cc385b3d40892159a72778fcfdf86ea8e0c5
font_01_sfnt_off0001058f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058F 11080 bytes
SHA-256: 8f108b327455889c506d632bfc681bb61792eb239debbbd7ba771e1b3ab553c5

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