Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae7cc86772fcbd9…

MALICIOUS

PDF

78.1 KB Created: 2021-05-03 22:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f16854d2db3c8eecea9aff1144a9a676 SHA-1: 2b015f3f56b51d17ee36dc59e81f265b28227aac SHA-256: 1ae7cc86772fcbd9998f2a80cd5b11e816ad7e3c4cd30158a1e4bd03b23d7604
194 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the embedded URLs and the PDF structure itself are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=what+is+prevent+strategy+in+schools PDF link annotation
    • http://fishland.store/film_american_sniper_google_drive1pnqm.pdfIn PDF document text
    • http://jisetatiloro.scienceontheweb.net/91858858155.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5fc919697d0d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_601677f11b64f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483855/normal_602a50a93f9d0.pdfIn PDF document text
    • http://gidpopiteru.com/baby_laughing_bubbling_remix_ringtone3ndlv.pdfIn PDF document text
    • http://mizarujil.mypressonline.com/divadepumerewisij.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/34611179869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500669/normal_6019f9073768d.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://fartook.online/how_to_work_a_room_summaryf3191.pdfIn PDF document text
    • http://lessonsonline.site/29399168250m62a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_676736f719b04b31b77872b49a33e96a.pdf?index=trueIn PDF document text
    • http://gejofizax.rf.gd/xuregodebiluv.pdfIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_3880348978d7489f88f44dc4affb440f.pdf?index=trueIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_42987aab0bc14a4a89d68068a7d8addc.pdf?index=trueIn PDF document text
    • http://tolisukik.epizy.com/36998770670.pdfIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_81a5066a07764e069681f4b5e27a32c1.pdf?index=trueIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_5d6addde9d3846e58e35e9a9acbd8eb0.pdf?index=trueIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_1c4a0c33e5a040c7ae7d62a605b951a2.pdf?index=trueIn PDF document text
    • http://tarebepanadobep.rf.gd/expressions_allemandes.pdfIn PDF document text
    • http://kutezowifemiwe.epizy.com/40809963880.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_c07e0035bf4a446db90858681377172e.pdf?index=trueIn PDF document text
    • http://fuvogixerad.epizy.com/sutezegupuxan.pdfIn PDF document text
    • https://f50ece36-1901-4a7b-9396-968a400df7f4.filesusr.com/ugd/3ecb95_c964995e8d2a412eb8747b6f363f6754.pdf?index=trueIn PDF document text
    • https://712e085e-8422-4094-ae2e-709d430f1fc9.filesusr.com/ugd/bf8edb_79aec0f16ad04187946138042d961e35.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_5e49d0a7ecf44230b58d7c8ed0a388b9.pdf?index=trueIn PDF document text
    • http://bujijawuta.atwebpages.com/91532835278.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_off0000f352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF352 5372 bytes
SHA-256: bc6fe9acc127627bc53b80073efa9300bc82fc201689c241a380327654a09026
font_01_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 10928 bytes
SHA-256: d53c3d0a2cd2a9318db1a854879b90834286907061e0be2edb8694b43f241867