Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aeec27330ade11e…

MALICIOUS

PDF

74.5 KB Created: 2021-06-03 11:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fee5e1d180bbf888a2eaae43baf64aa1 SHA-1: 56da2f39dce6e3c749ee26372a6b27ea1e1ac2ba SHA-256: 6aeec27330ade11ef1cea6a7b3cd6b9c2240d78a88d5a2b737c10f9e7dd3c116
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external links, some of which point to disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing or trojan variant. While no scripts were explicitly extracted, the nature of link farms in PDFs often involves JavaScript to redirect users, suggesting an attempt to lead victims to malicious sites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://irlanc.ru/pbw?utm_term=skyrim+change+npc+appearance+racemenu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417528/normal_601e65447efeb.pdfIn PDF document text
    • https://daxakowov.weebly.com/uploads/1/3/4/7/134704390/05c30c84046b253.pdfIn PDF document text
    • https://timurikamaz.weebly.com/uploads/1/3/1/4/131406182/5d90abeb9918396.pdfIn PDF document text
    • https://wabumixa.weebly.com/uploads/1/3/4/5/134585451/9227381.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5ffb0618df90e.pdfIn PDF document text
    • https://wapixetisabin.weebly.com/uploads/1/3/4/6/134685373/3517888.pdfIn PDF document text
    • https://bivupiduxod.weebly.com/uploads/1/3/4/6/134664268/da6391f2c7c.pdfIn PDF document text
    • https://litudawugo.weebly.com/uploads/1/3/3/9/133997631/sedufebomopunati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467017/normal_602f7c56bd7e4.pdfIn PDF document text
    • https://sijivijotulexe.weebly.com/uploads/1/3/1/1/131164009/zatokopanifar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kufujibumufa.pbworks.com/f/vogelhaus_blockhaus_bauanleitung_kostenlos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df83e030-051f-4436-bedb-5a2ff964a94f/iso_22000_awareness_training_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2616dbb-f3c9-4280-9108-128828112406/text_box_icon_png.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f1c870e-8391-458d-8a71-2a529c1b8ceb/zopimikonupobibibini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c44ca4-d5d5-421f-aa2b-3c37a44b55f1/how_to_use_a_roblox_blender_rig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f1b52f-9d96-4f5f-ac70-a29041e82d73/washing_britax_advocate_car_seat_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36585f8c-913b-487d-bdcd-a0ec2db8e29b/vubibuxavexuvovoru.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/f/ejercicios_ingles_presente_simple_y_continuo.pdfIn PDF document text
    • http://zuvevetub.pbworks.com/w/file/fetch/144422226/spoofer_pokemon_go_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0734c55b-c485-448b-98bc-8b4a12d2039d/17005074340.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_off0000e68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68F 5404 bytes
SHA-256: fde94a4350960b0071f97b33f9c117930594ebf70a6e051f72fbcc4accafc133
font_01_sfnt_off0000f8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D8 10508 bytes
SHA-256: c45ec4aa325b9c1523d1dacc8a558297ac8e98d5b3afa75e6aa200e265507fb3