Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aeebbeee1485195…

MALICIOUS

PDF

88.3 KB Created: 2021-07-13 23:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa4e5183d189158b12b3b72fcfb8ac21 SHA-1: 299c43d9da99a7f487dd3f2c9cafaabc137044a5 SHA-256: 3aeebbeee148519548a350ff3b2419eade42776f0be9b46bacb53a42efd45a26
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fd1579ed2---29428401728.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/e395f06782d616c7f254b69ba5af99aa/tajilenuvasabunozinu.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160da3a6fc4bf0---savowuxilogafunuxale.pdf
    • http://beautybybelief.com/admin/images/file/xaselenedonuk.pdf
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/jumab.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdc96199a9---46934206084.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095bf9898a3f---dedemejamisen.pdf
    • http://computergramm.com/userfiles/file/fodanisopa.pdf
    • https://ludifrance.fr/userfiles/file/93377929962.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/6e5ff089b7a46990eb3e90f193004cd7/tonovimopo.pdf
    • http://ourhkg.com/UPFILE/userfiles/files/lafopu.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/8eb87d772de5ae8fb5fd658aa9f5292a/jafekajinif.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/020ea79b87adddd61aaaf792473e3775/61912682420.pdf
    • http://pc75.net/upfiles/file/1624596513.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/adf821b68fda4df5bab89c39005b7b86/reguki.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/6628c574f7881d65da72c231e993b62e/6020067708.pdf
    • https://an-professional.ru/img/files/file/benup.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079099613e21---butejefegetane.pdf
    • http://kemenyseprosiklos.hu/upload/file/59408187699.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d28c82bf539---74217680387.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/49a74124ba4494a38d879ec157693d70/kilexajubusisenulixozopi.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0766327acaae836504236476384bcd3a/xinovawagirorodig.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=words+in+a+pic+answers
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/086ec505130f234085d534917f2e0aea/92091186320.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_off0000f822.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 16792 bytes
font_01_sfnt_off00011034.bin
f094ba90a1dd0d56a77b42e32eb4709f15cc39d2b5cfe2fc5a8a501e196a7b78
pdf-font-stream PDF embedded font (sfnt) at offset 0x11034 16884 bytes
font_02_sfnt_off00013c6a.bin
1f9f91e52d2dc9f3e7567174cc5248510d31c79cf01881a2be780c79106d52f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6A 10444 bytes