Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0341da494f0562…

MALICIOUS

PDF

85.2 KB Created: 2021-06-27 13:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d7812c6e99d170a58099e8857628e43c SHA-1: 14b00ed2f85063184cdce2732114b14ec9154ee4 SHA-256: ab0341da494f0562d93a9ad9c11cdef239baad9a7c5ff688ee17ce8f26e4c8c4
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML detection and ClamAV signature. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories on various domains. These links likely serve to distribute further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f34f8e734817dc25ec523dffb4e27d8a/xudilesaxitirezemobulog.pdf In PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c0201fb99b4---vimupumazemamulazif.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/37863825450.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/093f48b0263304c8fde1811b672153b4/teduxofunemotojesokabe.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/55721840215.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/sajozid.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160819c1d2d2b6---97175366145.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de18127aa1---76969898164.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c506b7df5b8---vezupubobugukukajoven.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/873590996609c6bc577a32.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/0116a77d94026695fcc058eabed089fd/dogatuzinojijagipezam.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/fbcf58992919744adc3e6d1bfa3cbb40/vevelimujudevevemumuxi.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/sazabelodapenilepa.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f47e79dd4---99316029427.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a211890f5ca---33240548519.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/doganosabadizoz.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aac821f7e3---48752600419.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/68874778086.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/a0da71b123337aea0c22dac628f6b45c/45578690183.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/c73dd00b2effeded5d8ccc07afdd168e/wuluwe.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/45999714681.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa91573fc23---timalop.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/8235345918.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abd77eef9b4---mafejogaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=check+if+snmp+port+is+openPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10487 16504 bytes
SHA-256: 99fc2905f053b557ed51a563461d3f3ceadc4326e7a3550657f38ebd67488935
font_02_sfnt_off00012f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F72 10660 bytes
SHA-256: df4a882bbb3f6c907bf8eeb14d20ac4bd01728b004bc6f8bf6674c655ce77e0e

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