Malicious PDF — malware analysis report

Static analysis result for SHA-256 32eda71245173345…

MALICIOUS

PDF

79.3 KB Created: 2021-07-08 09:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6570b1a9f8775b0b24b9d9b584468b26 SHA-1: d118e1e006f917bcced62188bdb7b42ee79f59f0 SHA-256: 32eda7124517334596ac8f5c56a2eb5249dff6c05c985492013d18736a89e728
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malware or facilitate phishing. The document body, though heavily obfuscated, appears to be a lure related to job interviews, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e98d507453---82357440262.pdf In PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdf843bd84---sozad.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/kibire.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/46c3e8402c05b38e86079eda77edee46/zinibi.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/97364548083.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a9a75c2a52a015dae4df73e29e8816fc/bofatorarurazupojosud.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210621155827.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/92740044677.pdfIn PDF document text
    • http://rubensova16.cz/files/file/sofigufawukukotet.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/76976621682.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adaad628f9a---58501762592.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/55b5e1557787a11f3ccc0141cf03564b/69636970577.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/podijotuwinefevenet.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ced5190d5c7---25507967919.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210608155334_ls6uts.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/28249256270.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/86560040194.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-4-28/20210428220444303519.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/pf8e7393av9jg4vqhh7g85fs53/mijagalefumu.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb95c33c100---dojuk.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/52008839391.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=job+interview+self+introduction+sample+fresh+graduatePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22A 11448 bytes
SHA-256: d2caf9af90203352b472068b944f8cb1e6357014386c45d4477766b135b3991d
font_01_sfnt_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C4 16608 bytes
SHA-256: b619754b7843537547c7f742a488109ef6392f07cfe84129928e1b5c5abf4c54

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