Malicious PDF — malware analysis report

Static analysis result for SHA-256 0039a046dc377750…

MALICIOUS

PDF

79.7 KB Created: 2021-09-07 12:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b82f71de347062b45dc487f47e2721ac SHA-1: c82adda726bd303ca8037c76f12a249afcb9ac9b SHA-256: 0039a046dc377750da23be21ec364bf4e1c2015b9f6d204a6cf81f5932e70b91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links, many of which point to compromised CMS upload directories. The ML classifier and ClamAV both flagged this file as malicious, indicating a phishing or malware distribution intent. Although no scripts were explicitly extracted, the structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://cordovajewelry.com/images/file/bafimilugoxotafaputupuze.pdf In PDF document text
    • https://dollarplus98.com/images/upload/files/punutasewiz.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/r1qgs80irf0s787ehjhv497u3n/paxaganabe.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8120593a3---gulamebaxu.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/40462145930.pdfIn PDF document text
    • http://whsclass1968.com/clients/f/f8/f849445bb2fb8f42e7c863050dc1ba38/File/24437418487.pdfIn PDF document text
    • http://gr-chem.com/upload/files/13804723065.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/raxelaruteruji.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/rezisigije.pdfIn PDF document text
    • http://maplewoodmachine.com/clients/1/17/17f0ea2532424b9b8bf99baf53cd3763/File/wivubuz.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076ad5def52d---37201797887.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/wokokatako.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/93096566018.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210720025806_dy8maj.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077be0b375c7---defadakefoluxoxokabum.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/96817865100.pdfIn PDF document text
    • http://watch62.ru/files/files/losokugitiku.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/mawevakedaxanenu.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/tujib.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/sezazevaz.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/21112831448.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/qerfkq415ecqcuh734pfd0a0bh/33635570386.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/f722975bf27f669af08ebe2e93c1a3b5/tunubopukuxakezavu.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/49277973878.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a87e9b29975---23110953749.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/36918460040.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/89869389385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=list+of+main+verbs+in+english+pdfPDF 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_off0000d056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD056 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE868 18476 bytes
SHA-256: 6ea70006dcfb61db64197f2dfa67a0eed7083e53b3124f175d20f94fd2ce333d
font_02_sfnt_off00011737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11737 11108 bytes
SHA-256: 49715e11e6f130b35f4326a93518381ff57bdd16e1630774f5471b6f3ddac165