Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f21c454a610440…

MALICIOUS

PDF

77.3 KB Created: 2021-08-20 09:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c6cbd55f0496a65ce7050319c7dd7746 SHA-1: 0d1779c6df5a257e62978c90696d0367e77b13b0 SHA-256: 49f21c454a61044006c004d01ac1cbb0580616ef2b5304ab97aa383507f570c7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document is classified as malicious by ML and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The heuristic 'SE_MFA_LURE' indicates the document is designed to harvest credentials or abuse multi-factor authentication, likely by presenting a fake login or verification page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://laborke.ru/uplcv?utm_term=how+to+pay+ptcl+bill+online PDF link annotation
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b770707c629---gaxupalufilawuvenosu.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf67ed9b9b---muvunederujodikonemupo.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72b1b25a51---didobuwim.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1a14e94ec51e56fd6c117a40d885898c/85955299154.pdfIn PDF document text
    • https://signika.pl/Upload/file/78653442690.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/xidizewewa.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/imvnmsid4fk0s5bbar0qh2jdu6/ruwakaju.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/zevupamijaxunozebudowokap.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/daba98c605163ad66b8e5a52267950e3/rodiwadipolabe.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/48526275679.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/1qot1g7tqpipe8lthp44pvav24/59934070810.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/kixebixuw.pdfIn PDF document text
    • http://udemadriatic.com/userfiles/files/9754257057.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/piwojuwaruziga.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/dejusizubodoruvi.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082606781f7e---80333519801.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/lonogikutegu.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/0b521e8c2982f92451976a6fdf7f3a13/kunujedezonibuwidusa.pdfIn PDF document text
    • https://phuquiland.com/upload/files/vaxajexunemekib.pdfIn PDF document text
    • http://bivalyracing.hu/files/file/9919403434.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/29aec7e605d95d0d79741d3d34fdeaa5/sederiwafobifubiludasizej.pdfIn PDF document text
    • http://www.emailposte.com/pictures/1285224236.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210809020754.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAE 10428 bytes
SHA-256: 3e41220c40fd7e0b90e6e952de9ee91af214c267be920d48364be5a346684d21
font_01_sfnt_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC55 16728 bytes
SHA-256: f33095edd0dfbdff22390681e0b18d5e946278e5eef71b087bf4e63c6180fc8e

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