Malicious PDF — malware analysis report

Static analysis result for SHA-256 94986e47e2ffdeb8…

MALICIOUS

PDF

91.3 KB Created: 2021-04-05 18:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dae921c52d35cc2ee54c068e601465a5 SHA-1: 46f9ea561426d64e20bf3a440ae9018f0bfe63f6 SHA-256: 94986e47e2ffdeb8de207ac89f6a85f73dd04d6a62fa93ca5fc1f7e3b9792546
194 Risk Score

Malware Insights

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

This PDF document functions as a link farm, presenting numerous external links under the guise of search results or answer keys. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are hosted on disposable domains, suggesting a malicious intent to redirect users to potentially harmful content. The ClamAV detection and ML classifier further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/123?utm_term=neet+2019+answer+key+official PDF link annotation
    • http://complerbnp.com/861733496009kw9l.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/mbgdlif/battlelore_command_ios.pdfIn PDF document text
    • https://gifapaneg.weebly.com/uploads/1/3/4/3/134368366/f28ca2e94.pdfIn PDF document text
    • https://cdn.sqhk.co/menidume/cqjhIlp/beneath_hill_60_sub_indo.pdfIn PDF document text
    • https://modulofironufi.weebly.com/uploads/1/3/4/4/134402713/18c63.pdfIn PDF document text
    • https://mixojokujize.weebly.com/uploads/1/3/4/3/134387696/tuwezugafuzure-puginoxojikisu-ketofunuvubij-ruvosijeketamof.pdfIn PDF document text
    • https://zitenimed.weebly.com/uploads/1/3/1/3/131383388/3441770.pdfIn PDF document text
    • https://jaluzirilunotu.weebly.com/uploads/1/3/2/6/132681851/kibasazimux_pafovifu_zigakokeveviri_bisafog.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/kiputiwiburulopovodupu.pdfIn PDF document text
    • https://cdn.sqhk.co/wugoselubiki/FhcTCVm/delotiludok.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/hgSw8ib/xanorivapifubuxuki.pdfIn PDF document text
    • https://zogazakuf.weebly.com/uploads/1/3/1/6/131636678/c15f1ce7.pdfIn PDF document text
    • http://pestore.pro/background_color_android_studiotf9ae.pdfIn PDF document text
    • http://wefilevazobakeb.mypressonline.com/37715833584.pdfIn PDF document text
    • https://pejoguroboxifuj.weebly.com/uploads/1/3/1/6/131637830/rugosike_baxobumif_tipuzogesoxoma_duwakitone.pdfIn PDF document text
    • http://gouliwer.online/student_bmj_author_guidelines3sklu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://wenares.myartsonline.com/92850426235.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/wedebovuwume.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/73867951577.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF313 5372 bytes
SHA-256: d3752e5e2f4ab5d28f9cde5beea851fe35251a251758f6a2a23e254bd43c40a8
font_01_sfnt_off00010579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10579 6008 bytes
SHA-256: d479d5848069262d41ae534a4633aaa3734357bd461039e33bc7344ff130e97f
font_02_sfnt_off000118ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EE 11172 bytes
SHA-256: 4fe24a37efa6bfa3774e6e6a470d57547beae421f883ddcda07582da588ebd30
font_03_sfnt_off00013f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F16 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
font_04_sfnt_off00014d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D15 4896 bytes
SHA-256: 4ecdcdb3451ac180455d3309f4468e9e888150cd58b4e735c7003573c6ab4e5a

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