Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48a10f9fc5563b3…

MALICIOUS

PDF

91.7 KB Created: 2021-07-03 00:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 53af291aa9d443b1d813f798b6e9cd47 SHA-1: b211713eba625ca3daf9fa9d9ff78cf018b39475 SHA-256: c48a10f9fc5563b354a673b49fc7914c6b81e4f40f2e28abcb5e8904b7b6d8bf
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to multiple disposable hosting sites, a common tactic for phishing or malware distribution. The presence of numerous unknown URLs further supports this assessment, suggesting the document's primary purpose is to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://manpukuorder.com/uploads/files/vogagatepegotexu.pdf In PDF document text
    • http://easyreturn.store/userfiles/file/miranuja.pdfIn macro / runtime command snippet
    • http://icsbc.ru/fuploader//file/wifibofobosijaji.pdfIn macro / runtime command snippet
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/036ce475b8790775efac133c7687d9d8/31199850785.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/37994078115.pdfIn PDF document text
    • https://actorconseil.com/files/file/64111946455.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/dewapujubigoletexugibon.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/sku65llk6n7asjmtt9l3hc07j8/tipipixe.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/af9f8dfddb147b6eeb39fb853c279e44/94368097475.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/f611ad1bc9fc78e3012c6fa8e9e7ce48/wajotozi.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607d079d162bd---13155550683.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/9225443881.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/uq6qsvqscrtv2i6rsm0pcmgiq4/2114348593.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/9156822331.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/sdetb53qqpjqialjkid83k2i77/kifopigapimutinowamal.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16073144ed7487---18304815095.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/bosilurotijujilelu.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/fdb6e322532e94ad197f398aa1134085/66890025094.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85b8be164---80116174097.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/534cb58235e988dd21337b8785cfa14a/mijomajij.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/besopojalevenok.pdfIn PDF document text
    • https://reniuved.it/file/24089939797.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/49eb658e842e98bfbb8106274bec3748/82131690248.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/vogaIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=hair+getting+curly+at+the+endsPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5E 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_01_sfnt_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 17132 bytes
SHA-256: 63b011cd810ebda96fb01266b9e9d2e3bc31de29a78df094436f7664cf54d29a
font_02_sfnt_off0001308f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308F 10732 bytes
SHA-256: 0722711e400ba23faa456d86921370237b8a763abd6da03a8fbbd5234d758648
font_03_sfnt_off000148ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1