Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65ae759f6bcfa03…

MALICIOUS

PDF

82.6 KB Created: 2021-06-10 16:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e1162886f08f592154d1190b0f78b31d SHA-1: 64eb10d5d0f354fb389e07cffb8e01cf85556734 SHA-256: f65ae759f6bcfa038fad2580c641b5164d3d4608f58f7cd848decdceeb74022e
196 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites or domains with suspicious naming conventions. The document body contains text related to 'Miley cyrus topless pictures', suggesting a lure to attract users to click on these links. The presence of multiple PDF_URI and PDF_RANDOM_URL_LINK heuristics, along with a high ML score and ClamAV detection, indicates a malicious intent, likely to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://inwebjor.ru/uplcv?utm_term=miley+cyrus+topless+pictures PDF link annotation
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607c34605a659---11269570208.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/61953523890.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/84366251166.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/2e4990884e25221dcc0f9bf17c88e8f9/97364798677.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/hkqvig3q68r018jp02g0dtoj32/sanowavudijivabepigi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/da1baf69741f897bfc14a9854be68bcb/19312108720.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/c4jakp6vj2dljbsjafed54qu81/39971345531.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7edfe3af6---wexufagosexexenore.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/jimumowudamefaxulowim.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b8eb03ae3eeb016dbeec1a88f95984c1/fopavipezerujoroxup.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b6e5a2e61156afcec41bad69890db1d8/26372783098.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160aebc7eabb65---verojofewosijajufo.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/xufavawolip.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ac1af430bbf---68954479105.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/rizozapaso.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/19286532586.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/50apmlv2kqbtoiff461em79jmn/vevenobarulazik.pdfIn PDF document text
    • https://ka-base.no/images_content/file/42472534397.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10569 4824 bytes
SHA-256: 45f882a8fa1a468dff074867dfa268a0f43d1633252d60e7e9b05825c7e9ee8f
font_01_sfnt_off000115fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FA 12144 bytes
SHA-256: 7e9efe1bfa49b128744d8dc0e40348ae2d7274d42cf7457b7365a41895ea7e5d

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