Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba662116aa275ed…

MALICIOUS

PDF

75.5 KB Created: 2021-04-30 20:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3fe6aa3756f0ead29f55d1af2123da9b SHA-1: 91e127d275aff4d04be11de345c1d726469d2267 SHA-256: 5ba662116aa275ed44b9a90bfd4c9a7cbbc3e30d233af693791f1e10e3aee08f
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://xajibur.ru/strik?utm_term=hp+4500+officejet+wireless+setup PDF link annotation
    • https://gajabalavira.weebly.com/uploads/1/3/5/3/135347595/bajosafuna-kiwakesavugeku-kebuvekivop-nikigivimote.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/pl_sql_iterate_over_select_result.pdfIn PDF document text
    • https://nigomisenavuluw.weebly.com/uploads/1/3/6/0/136095850/8656029.pdfIn PDF document text
    • https://cdn.sqhk.co/biwizalibe/d9jfkAn/62873818965.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/dgfifop/3d_origami_red_chinese_dragon_tutorial.pdfIn PDF document text
    • http://nipawifaxupus.mygamesonline.org/solidworks_tutorial_free_download.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/fasijulelaxufepitola.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/68856697061.pdfIn PDF document text
    • http://xenirukanasi.iblogger.org/maharashtra_election_results_2020_download.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/mesez.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/how_to_reset_relion_blood_pressure_machine.pdfIn PDF document text
    • http://difipalilif.scienceontheweb.net/mawuje.pdfIn PDF document text
    • https://bezatawe.weebly.com/uploads/1/3/0/9/130968967/dovaguf.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/vomokadaxuzora_matexuwikafidu_fomigoxagiv.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/clasificacion_de_animales_vertebrados_e_invertebrados.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ravefitupuzam.epizy.com/92021583328.pdfIn PDF document text
    • http://naxepedawizozet.onlinewebshop.net/wiwosaselatekevipuv.pdfIn PDF document text
    • http://fuxuxasezid.atwebpages.com/64901109788.pdfIn PDF document text
    • http://xazopufegi.onlinewebshop.net/zibobigutuxilifixuve.pdfIn PDF document text
    • http://fujuwadutat.epizy.com/givifogagipoter.pdfIn PDF document text
    • http://luxupuxud.myartsonline.com/34670384091.pdfIn PDF document text
    • http://dowafirowelumex.atwebpages.com/24205175452.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_off0000e9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 5280 bytes
SHA-256: f634d52cb663b4eee8abf83e8a215920722d38a956b396c8646335c3b6815e0c
font_01_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 10956 bytes
SHA-256: 70c657e0239f9d4f295e03dc85b87b82e8c2947adb2ffbc4b8ca8160e2b31c69

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