Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d22104229416a8…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 23:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cc05f9dffd0e45e92a54f0958167d565 SHA-1: 18adcc755310bb0bd8cce6f0253f3a089012e3a3 SHA-256: c0d22104229416a8b160291ef43b85fba89bf7644bd727592acdd12931510a67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://apex-architect.ru/images/file/nixod.pdf In PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/53753011608.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/vikiwemepidugonemapegalu.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/fusumokowipon.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090420525898.pdfIn PDF document text
    • https://davaocarrental.com/images/file/vesokajolokevo.pdfIn PDF document text
    • http://rfaaa.com/UploadFile/file/20210918001913191.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/75995496532.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/42117782667.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/nowom.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/699bb379a42ec7ce14b30af8fb43dc9b/fusajijobuvofopivo.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/67792819346.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/61013011118.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c4db7990a---79339246808.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614465bd7541b---xuximomukubajovubomeziguw.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/kijojok.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/jabono.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/99435187655.pdfIn PDF document text
    • https://quangtriasianwindow.com/uploads/image/files/77509275620.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16143568e8088d---xanedofitaxuvedemikor.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/65394038090.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/tijegojexivofebufa.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/zevuxises.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=worms+apk+downloadPDF 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_off0000b2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C6 10404 bytes
SHA-256: f7125a8601ce304ed74e9799dcba23d11cf3417b268865cde10d01dbd9a7335f
font_01_sfnt_off0000ca55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE267 15048 bytes
SHA-256: 8747ba7e80d8fa22367b1c99c396df1955ad692244d4f26fcdfd737b4d1764d4

Open this report in the interactive analyzer, or submit your own file for analysis.