Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e0469a30c6c267…

MALICIOUS

PDF

174.0 KB Created: 2021-07-22 14:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: fbf8a0eb85e8f6894d5a4809208b05e2 SHA-1: 57d12e40a27a84176d7a3c2e07fc709bf66cd4ff SHA-256: 83e0469a30c6c2672663cf0e0409037f2000f8dad7efc1f948a45fdfe435bc6b
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload locations, suggesting an attempt to distribute malicious files or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The file's structure and URL patterns are consistent with common PDF-based lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098774296008---85311652219.pdf In PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210522073302163.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f833fb8be68---97820518894.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/vezerusujelivunejisiwe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc00755bae---39879606972.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/h1vmvmc314820o6rg0lqcbh586/gorafikugerebijebomeb.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e06a18a870---wipafonejedus.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/kemevuboribavumituwogam.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/67558303041.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/4dddcff3197209512a3259e2cec56116/23546862738.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c691b5a90bd---vumikuvijotunebopimuf.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/xuregutumudosameti.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a56f551fd---28125102630.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160852e6b87143---julimi.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/pecopceusukim11ojb8qn9qfvv/sotazuginesaguxusobo.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a922dd0c17a---mujujuwozenulefe.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/sebutenuxa.pdfIn PDF document text
    • http://scottleddy.net/clients/862555/File/17863446358.pdfIn PDF document text
    • http://zerosquareonline.com/file/pepalegokaput.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/11256440885.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa4a8e76ab---73088497906.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=list+of+hottest+temperatures+ever+recordedPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00023361.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x23361 22652 bytes
SHA-256: b53ea7b02839a7c438a4684b78377025d9051657cfba7c2129f1cc55a929e9c7
font_00_sfnt_off0001e676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E676 10860 bytes
SHA-256: 20ffa3117bcce4cf2d50a32eeb92d54ddd21523bd5d0f37df10fd2cc6a3c16c7
font_01_sfnt_off0001ff9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000217a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x217A9 8616 bytes
SHA-256: dc4db9d15b81c8c222e787cb19e1ef61ceb0eb60cdf795717be772f4d0afa24d
font_04_sfnt_off00025b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25B30 34108 bytes
SHA-256: c07e23be50b8e1bb69f64ec976cee150c3bd8d62691f39a7c29f295dd19a65e2

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