Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbecbd1291b7564e…

MALICIOUS

PDF

74.1 KB Created: 2021-06-26 01:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a262235dc7a8d6795a736a2f74963568 SHA-1: c32f3f04e00398df0a83b63d9b79f874a5a55383 SHA-256: fbecbd1291b7564eb3fe09da453a046c164ae073fe6417b0895fc1905126acb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting domains, which is a common tactic for phishing or malware distribution. Although no specific scripts were extracted, the presence of numerous embedded URLs suggests an attempt to redirect users to malicious content.

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://pezenasenchantee.fr/userfiles/file/44640560524.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/12a866415e15f871d3f05445cc4b7a37/levevobadojedalamowetur.pdf
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/nejubafujaxemusebudupiz.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0953ebafe91514258694f2628e3bdd91/piluzu.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b579d71a62f---78803188198.pdf
    • http://jshtextile.com/UserFiles/file///74281970624.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/da432de6972e19c8ddbf9ed0db55b245/62720427935.pdf
    • http://chnli.tw/CKEdit/upload/files/53798302532.pdf
    • http://bright-inter.com/file_media/file_image/file/52698747858.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6aada57210---rutexadifikonifaralomul.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bbcf1f0eb---peketimebi.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfdaebd824---21397303996.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b1a72584---24104704271.pdf
    • https://galerie-louise.be/userfiles/files/60953986457.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/026ee626ec268cbaffef1a61e86c19f5/4809629223.pdf
    • http://bobas24.pl/Upload/file/kadoxitaxizotepaxedak.pdf
    • https://autotrans911.com/thread/admin/uploads/file/12454010961.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d0985fd620b---xoxeroge.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/2f0378c7ca5883d9ce856add3a408dbe/wovunezen.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/7c00eqkbrchhqn00e4te68io6r/kamulufanejonakimidi.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/fj3iu4dbvsbgtg6aini4fjhkb6/rijojenikazobivewero.pdf
    • http://ayhancevik.com/images_upload/files/kapujaleloxanitomido.pdf
    • http://nessium.fr/userfiles/file/gixifisukeb.pdf
    • http://atthaya.com/file_media/file_image/file/85539348945.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+new+highway+code+book+2+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9E 16792 bytes
font_01_sfnt_off0000d5b0.bin
c6e40240f237014250d7ce77a5269f16b559790d6b99dfd2965738dab125e176
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B0 16876 bytes
font_02_sfnt_off000101da.bin
f3a839b6bc1a8d0f65440ee37047cc15e8a8eb94e056de7eed549e21efdb1f7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x101DA 11000 bytes