Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7f26b2ada274b2…

MALICIOUS

PDF

74.1 KB Created: 2021-02-09 00:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5fd47d46327e9232012c4005ad56afa1 SHA-1: 4d250fda41e077c6b36cf592408d386e3f296b60 SHA-256: bb7f26b2ada274b24638b9f8a33be3fdf225618af929e46b6dc64fd641277c74
186 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to numerous external PDF files hosted on various disposable domains and free hosting services. The document body and embedded URLs suggest a lure related to "Sarkari result" and "answer key" information, likely to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=sarkari+result+rrb+alp+answer+key+2018 PDF link annotation
    • https://tefajarusi.weebly.com/uploads/1/3/0/7/130775660/rijomab.pdfIn PDF document text
    • https://sumewawuvivifos.weebly.com/uploads/1/3/1/3/131380344/8c842e.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/hhbgcid/shelters_near_me_open.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/jdIpgjx/97705302270.pdfIn PDF document text
    • https://bunekapizo.weebly.com/uploads/1/3/0/9/130969144/8803151.pdfIn PDF document text
    • https://rojanebe.weebly.com/uploads/1/3/1/6/131637229/rifukebibebigo.pdfIn PDF document text
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/wamuvejajelu.pdfIn PDF document text
    • https://gojulujowavid.weebly.com/uploads/1/3/4/8/134886085/jomema-lusisim-mefasewokonugu.pdfIn PDF document text
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/59c556acdfd2d.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/genti9f/xexesatijozeli.pdfIn PDF document text
    • https://loxufoxoxow.weebly.com/uploads/1/3/5/9/135982175/2298905.pdfIn PDF document text
    • https://memuwumobodedo.weebly.com/uploads/1/3/5/9/135974490/xesozipunofe.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://timikawimi.rf.gd/first_marriage_certificate_form.pdfIn PDF document text
    • http://divejekojo.epizy.com/bhojpuri_bhakti_audio_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/jafakewibizewudenakoxusa.pdfIn PDF document text
    • http://dojopugoput.epizy.com/lokigedevevan.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/5236166664.pdfIn PDF document text
    • http://dowisakivu.epizy.com/forex_factory_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/getuwuxemoxozubom.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/body_parts_worksheet_grade_2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D3 5604 bytes
SHA-256: 4d1f5e11aed1a84439c105d3e4ca541d00e84fdfc1f46e4070b21b6bc186162c
font_01_sfnt_off0000e505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE505 12900 bytes
SHA-256: 1f0ef63ac3c910ed049d498439b42fc89a425334c9968e88e14a5383d54038eb
font_02_sfnt_off00010cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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