Malicious PDF — malware analysis report

Static analysis result for SHA-256 7151ff43b865f9a4…

MALICIOUS

PDF

113.1 KB Created: 2021-03-30 15:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f5b171f326c19257d3132f990c441b47 SHA-1: d61f758ba13e8bf26a2ff38303061dee6d486bb3 SHA-256: 7151ff43b865f9a468d9aa09f6665cf061416d1107aacaa5ac1c319d3e76314f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://golowaki.ru/123?utm_term=wap+movies+bollywood+2018 PDF link annotation
    • https://cdn.sqhk.co/nuvexajamu/ayejeOq/70978069043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5fd039057f8b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_60233f18f08f6.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/gflwSSe/acc_qb_challenge.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/20759543.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/ap_lang_essay_grading_scale.pdfIn PDF document text
    • https://cdn.sqhk.co/komifugu/NieoSie/monkey_running_with_arms_up.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_603c5d7aebf75.pdfIn PDF document text
    • https://cdn.sqhk.co/xalesikozip/j40xLuf/88100435736.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/ifidhbO/lesebelogafilo.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/hcV6gcE/93039280955.pdfIn PDF document text
    • https://cdn.sqhk.co/dunuxorigu/hjnjhhc/captain_america_2_movie_in_telugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473053/normal_602822e809bca.pdfIn PDF document text
    • http://sinomefonok.mywebcommunity.org/catalaunian_fields.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/xesigeze/18403580262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8becfd4-cedc-4139-9b62-0f63d27a3903/68886428451.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/mamivapodadenipamabu.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/ragekajaxiwele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1a09e5-806e-4c32-ab30-5601592b7f57/lagipifoxudegudopilago.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/80575209036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a21761-827b-4b7e-9de9-2edfc68fedc4/kolorowomom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d28f5b2-3c3d-45d5-a987-022ac14cfc55/wovez.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A30 5936 bytes
SHA-256: 4cc76e04b339a658c65773491d66286ca7105bfe99f95491337c37558fcb46d7
font_01_sfnt_off00015e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6F 11916 bytes
SHA-256: 195a333972f0f2966e5eb7110bd5d6eb2f0fd345b936ca5e464d39e8a9d08600
font_02_sfnt_off000186fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186FE 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
font_03_sfnt_off00019c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C4F 7632 bytes
SHA-256: 97d97e5885f3538d53125fb6ff3aca8896d378fab419760a01e7d492dab4aaba