Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b0e6204f3a8c27…

MALICIOUS

PDF

78.2 KB Created: 2021-04-11 03:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d2c7342b88b901ec97376b185dd1fbe7 SHA-1: 55387864729660fe52ca5405ce23ad833928beef SHA-256: 48b0e6204f3a8c27d1300dd7dff1790731bd08cf6a037f2020bd376e9fe4bdfb
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external domains, many of which are hosted on disposable or low-reputation services, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=bosch+table+saw+4100xc-10+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387061/normal_601dfaf171d8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483088/normal_602968f73be0e.pdfIn PDF document text
    • http://avit0.pro/dance_dj_songs_videolwmf9.pdfIn PDF document text
    • http://vseti.life/40762085894rga90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_6035fb596c95f.pdfIn PDF document text
    • https://ludajajuxo.weebly.com/uploads/1/3/5/2/135293479/gefimilizuso-zilixupapuja.pdfIn PDF document text
    • http://lemumelubijene.iblogger.org/2869076567.pdfIn PDF document text
    • http://idealica-co.site/beethoven_sonata_e_major_op_109kf4l3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_606deaf7b78ae.pdfIn PDF document text
    • https://xudufuzed.weebly.com/uploads/1/3/0/8/130815664/katiwode.pdfIn PDF document text
    • http://kismykeitio.best/mijanivefulezacngx8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kibululugavi.epizy.com/khud_aqeedah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d81a7b2f-2c44-41b8-a279-b4cb13994982/worksheet_1.7_subject_pronouns_answers_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3744ed3e-f50c-4f6b-8994-ac37b7fff9f5/how_to_read_annual_report_like_warren_buffett.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/carrier_centrifugal_chiller_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02f33ff-773f-4445-ba63-ebc6c68af913/kikuwujit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d07d6ee-ddc7-4fad-a3b3-8983f330ced9/zamubagale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866f40c1-6252-4629-8e36-47bca336eb6e/92059973728.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/99194088966.pdfIn PDF document text
    • http://senorumela.epizy.com/bukagasegimovokoderozexif.pdfIn PDF document text
    • http://danidarexixuw.epizy.com/finance_risk_management.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_off0000f14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 5612 bytes
SHA-256: 2eb90258c854247805723f58e09f9a0a76924d959cbe5068465c420468f69ed7
font_01_sfnt_off0001048b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 11604 bytes
SHA-256: 0847a34685daefbcaa255613480b4e1b1b85213245be384f0dc5684811aabe45

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