Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e35e2ee29b3ad05…

MALICIOUS

PDF

93.4 KB Created: 2021-08-18 01:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 40ba3a4270e90ecd1c9523b7cdebabec SHA-1: d74ee434099376dde1ef844c34d073fcd60856f5 SHA-256: 0e35e2ee29b3ad05972caa3a5e16481e6d9263a8a3142242166b403f23043812
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to potentially malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/673a49d8341a13be2697c8fce9b70dd0/26374864372.pdf In PDF document text
    • http://argyleliquidations.com/userfiles/files/38737958373.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/pukoxazuturusakirute.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/jitosegopavejibira.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/gorabukakes.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/sg8aeg09qco3eeflbiltjdq2a1/poxosusogirazonagimele.pdfIn PDF document text
    • https://diphong.com/uploads/ribemose.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/56847389656.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/kobivomixewatizede.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/72cd0652240a43e337982366213fdab8/11457784660.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b467a0ca1f5---gonate.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609980a09010c.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/39027864661.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210617_154245.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/23705345900.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/ketanezelogazawosejulo.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/uc1bpm9on6c72vv5624jvlaiaj/6003771897.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/58275329365.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/38398886550.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/r1tld5v71iber5on5ggmfue5c5/futuzizogidojobipesawiw.pdfIn PDF document text
    • http://gistys.com/userfiles/file/fijagubunonujavopazodobij.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160d845add6a84---58113529061.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/aae4ba870fd0ee9e5d15b1eca42c8853/16821772566.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/db8moq34mt1rta97hcqvu5j1h0/2205320961.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/71014762685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=salaire+enseignant+secondaire+priv%C3%A9PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 20364 bytes
SHA-256: 7a8b29217f5222de135399bfca5ff8d043200f82913a7a813cad3be7085416d4
font_01_sfnt_off00011b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001337f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337F 16552 bytes
SHA-256: 267f530d0d17902b564ac692a4d708c6bb3ece65ac2f0bf6de7faf1ce31c13c6
font_03_sfnt_off00014a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A83 10984 bytes
SHA-256: 1a5f8e548f340f66421399033e7ef683acdf3eaa35c49641e018eeee9f8ff1c7

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