Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b29700a38174957…

MALICIOUS

PDF

96.7 KB Created: 2021-07-31 02:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ee808ef9d798e45e178c13fc030acf25 SHA-1: d2bb4c06b050c8dd06c5e28ff93aef0183711391 SHA-256: 6b29700a38174957ce64cd25326c704f1e5957b5d1eaffb0d4be037621ef4893
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS uploads. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content, rather than direct execution of a payload from within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://pistant.ru/uplcv?utm_term=diagrama+ladder+partida+estrela+tri%C3%A2ngulo+com+revers%C3%A3o PDF link annotation
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/77f872bf3bdf44996389b77bd1e3a26c/xapegagonokufojolewerun.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/37204047555.pdfIn PDF document text
    • http://bociany.sk/media/file/36415109457.pdfIn PDF document text
    • https://isosklo.cz/uploads/21153926660.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210608_082F9856788CA35F.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d28ebdf2ae---21883587049.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/36504038045.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef709c1f6e---3956850102.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893043b845c---senamixitimuwez.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/4c377e1a22e19be7a99a885fd444c298/tipojoj.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/22meb07cst2a27tlggi5f80js5/zexudakibokutisobazej.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/68291406800.pdfIn PDF document text
    • https://dintek.eu/uploads/file/wotidowoweko.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/74377964857.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/32187248859.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/wipalemerojevipupiv.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/gixemudunaxujut.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/78669019034.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/vixarurakudadox.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/radcvjpj1idsfqaqeri1qavn79/zagutabika.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/24663731694.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/22102039206.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/28127783031.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b236b887939---refoginas.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/nazalozox.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73A 16068 bytes
SHA-256: 6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d
font_01_sfnt_off00010c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001246c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246C 19844 bytes
SHA-256: 1fd61b3edcdfe573ab439ffcb25961b36d889e763a509163ee96fe99177d21cc
font_03_sfnt_off0001568a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1568A 11476 bytes
SHA-256: 46df7f9c0c2b0e0d583a4ebeb2e00ecc72537f5927169dd0d588085f8f4cadb0

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