Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a47a2a4a79991c…

MALICIOUS

PDF

86.5 KB Created: 2021-07-04 07:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02660fcb6a368bee41432b3568dc0aad SHA-1: 9b8edccf1bac6d93874534b0edfe8cf9c48b906e SHA-256: e7a47a2a4a79991cf597a93b58b650cb93023cdea8a4f595d06b7bc83abd22ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://fecirturizm.com/resimler/files/53643266006.pdf
    • https://sca-kc.com/scauserfiles/files/mofawowinakokemifa.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f4cce492ef54e56144c9edcd86c18abf/wizokinokisusipapivesew.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20dfd81a06---7734111560.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2c06a0ff3---92059262899.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/f97a458104d176c34f3378336d1a4d54/jasosugir.pdf
    • http://bobmeetin.com/media/galleries/files/nevemusiwuvur.pdf
    • http://kath-kiga-bw.de/bilder/berichte/file/fawofofiwowodalumabij.pdf
    • https://eberli-medical-supply.ch/upload/file/bitugugowako.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91d395918---4998845027.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/18c028653c8c8984e7d44fca02400c7a/vojudefuxejewexozugiwo.pdf
    • http://www.lugashotel.com/data/editorfile/lutitodizovo.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/e9f45ad29c0eaca32ee4b4d82f4bf088/rabakogi.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/866i2boed127kati5kgolhvmvp/85619828060.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/2e5aabc6a07d0ae757d2419e92bd5ecc/bozujilezunomotogofemeto.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4562bc653---gakesipodarujida.pdf
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/9428829166.pdf
    • https://dacinsara.ro/fckfiles/file/xitojodo.pdf
    • http://computer-rudolstadt.de/upload/file/biwaxibegusilikikijade.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/b0b3020108012b1cc930ceba32eb0108/dupakurejagotevofagexa.pdf
    • http://morard-mcf.fr/data/Files/82223545920.pdf
    • http://laweasy.kr/userfiles/file/tametalibisejinavafowiw.pdf
    • http://edanieltour.com/FileData/ckfinder/files/20210616_3DDB760C857425D4.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=pinky+and+rex+and+the+bully+pdf
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ee623e964b1f636f5cb8ff11fea56315/5194565131.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_off0000ee81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 16792 bytes
font_01_sfnt_off00010693.bin
0517407170078c8231bd79731e9ee101c0cfac230ab2c09efb40f529cf0cd9cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10693 17316 bytes
font_02_sfnt_off0001341d.bin
760041c334cd49792f0f1ea8f47f0577fd56d4a23b9528a7770040226d5d6084
pdf-font-stream PDF embedded font (sfnt) at offset 0x1341D 10856 bytes