Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e188584fdc4953…

MALICIOUS

PDF

110.9 KB Created: 2021-06-24 07:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b7ff5b01cc9dcd7c3d03048d834fe5fa SHA-1: 119201b884e9f6e08d1865509862b572ca597df2 SHA-256: a4e188584fdc4953f2ef8bf39d9670a29fdb9b20540cb7141ddb3547d46c9668
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm or phishing lure. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=tajdar+e+haram+atif+aslam+download+mp3 PDF link annotation
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81efd1a4ac---dodobumupot.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd14113ac1---60850134518.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/27239934298.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e089d744a1---zidasiroxoza.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/b34d261f17fbaf05c5d1c6268c880dd3/wamisej.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7e9c7122a---xaloruse.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a3ba88cffb97e6463be20743de0dd6d0/81839535567.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d39697ad4f2081abcbf26313b139d06c/56619853889.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/42e008951b3158851c63ff3a8c522bb6/80632722236.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/fd4ec1a7211ab09056fac2d10ead2a22/87771368034.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/96285756723.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-28/20210528000924985796.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/02gphu7lac5k5ft3gkv5tuu3mh/76178291878.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b38d1865771---21411141036.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/58657349740.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/71327301315.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/7143b68c1f0ae97bc6a5c46900117107/tevojepuramixenup.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://fedorahosted.org/lohitIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00016a51.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16A51 23856 bytes
SHA-256: 91474307be1c7dc29568df98c3885f1cd1b0c6a5da4fded24fa32949cc87160d
font_00_sfnt_off00013093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13093 5352 bytes
SHA-256: 73a90857c1bed13c67cf0eeb6d756c901ea721ee46e55155beff04cc40a1e5e8
font_01_sfnt_off000142ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142BA 11556 bytes
SHA-256: a84e7ff360ad9f34508ed0a77c0cab076d256cd4e56030dcaa94c8105cc8720c
font_03_sfnt_off00019291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19291 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_04_sfnt_off0001a091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A091 3224 bytes
SHA-256: 80bdb70e9ce7608aa67450a75db920698f4e19d09005b90455175154ec120b1f

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