Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e3aad768e9d76d…

MALICIOUS

PDF

83.2 KB Created: 2021-04-13 10:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4c2eb82ee4970f842f4486286411cd41 SHA-1: 9b871732624be67c1c49a5b7b0428fb22baefaa9 SHA-256: 82e3aad768e9d76d3e22512a4d5f191f33d5ae5e01904113d6d09c2fd3320b8d
246 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 brand-impersonation credential phishing. 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 0.9957

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://lavozeto.weebly.com/uploads/1/3/0/7/130775819/mujulutiloxeno.pdf.
  • 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://dafemum.ru/strik?utm_term=what+is+the+new+book+midnight+sun+about PDF link annotation
    • http://fefikaniki.22web.org/neoliberalismo_en_mexico_1982.pdfIn PDF document text
    • https://lavozeto.weebly.com/uploads/1/3/0/7/130775819/mujulutiloxeno.pdfIn PDF document text
    • https://labafapagitef.weebly.com/uploads/1/3/1/6/131637364/3bba1.pdfIn PDF document text
    • http://fipodusot.iblogger.org/pa_compass_application.pdfIn PDF document text
    • https://sutesesa.weebly.com/uploads/1/3/4/8/134871168/rozadigajur-dorexegatiwus-gofekured.pdfIn PDF document text
    • https://vixagudidiw.weebly.com/uploads/1/3/0/7/130775505/20f29b33.pdfIn PDF document text
    • https://towimoni.weebly.com/uploads/1/3/4/3/134340956/1819196.pdfIn PDF document text
    • https://gopopozemilin.weebly.com/uploads/1/3/0/8/130874381/zemezitesamo-gabegogene-kugutorejogi-sutuvugatujid.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/gunisubobakaliwoso.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/9923b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/504a8a4e-0bc0-4e43-98fd-609abf55be09/passport_8500_x50_price.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/julejewefububanugugupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e6d994-d59a-4587-9015-caf51ef12307/wimovuvojinejid.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/desktop_shortcuts_not_showing_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/40148225627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee712a8f-8005-4e6e-ad0a-bb056156ae06/female_led_relationships_finances.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef8f5df-3213-48b9-9b59-828f4b5f0f2e/como_agua_para_chocolate_laura_esquivel_descargar.pdfIn PDF document text
    • http://nisogifamesada.epizy.com/chhello_divas_movie_openload.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_a9e5a71b5b1f4affbe13652c81a482bb.pdf?index=trueIn PDF document text
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_b4af701d38154579930c60161a66a17f.pdf?index=trueIn PDF document text
    • http://tuzufuwav.rf.gd/understanding_comics_the_invisible_art_review.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/arabic_keyboard_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef50752-4956-4010-aaab-839b99f1c4b3/78921013177.pdfIn PDF document text
    • https://b36ad067-21ef-4b17-9055-1dfcbb3fb98c.filesusr.com/ugd/8673ad_abdf86e80154464d91aa0fb65cf0b540.pdf?index=trueIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_9afc862cf87446ccb77072514c00859c.pdf?index=trueIn PDF document text
    • http://tinejamuwaki.epizy.com/shawn_mendes_senorita_lyrics.pdfIn PDF document text
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_446dc9c69d6240a38bcf00bf81f6d285.pdf?index=trueIn 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_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 5420 bytes
SHA-256: b7f762fc27f706e1297f7be50d6b8a8448857f20d4674502691a04370f4c386b
font_01_sfnt_off000116be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BE 11200 bytes
SHA-256: 0b723828e22957112369cd25b5a364b22123c5fdda7f1fd367162e701917a7d8