Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29ff289fa2e19fa…

MALICIOUS

PDF

88.5 KB Created: 2021-07-02 00:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d82018d95884fbb74b40706817b59969 SHA-1: 5cd85a6d7a87a8641940b37910f6e56038ed5574 SHA-256: e29ff289fa2e19fabd745b342616010f8734b6b29a46c8ca3e33ee2fc3bc6306
216 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating malicious intent, including a ML classifier flagging it as malicious and ClamAV detecting it as a phishing trojan. The document employs a social-engineering lure to trick users into installing a browser extension or plugin, which is a common method for distributing malware or stealing credentials. The presence of numerous links to compromised CMS upload storage and disposable hosting further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://allytemp.ru/uplcv?utm_term=android+video+recovery+software+for+pc PDF link annotation
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/rjhej8ursua7l0pmrjllen46c2/dojutebulotekapoxig.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/67376560a16cbb12565207487d78b5c0/xurelimisemexeduxegalil.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/38596105245.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d72e1941cc---40389560249.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/2040071585.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0d63142e2---45007304515.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fp1f852fn3u3j7od4es0kmstk7/gofubuzuduwitiw.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b4408a2a7---pizepag.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/61130486023.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/60341833179.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/jenpmtl5eru94bmaash8ccl4c1/16933439540.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/66096705606.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/516a79265f1d7574f6a37ce6630b83ce/vizonafijelofarojasat.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fec7cd5c5b---58248214927.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/dfn06g8roiamc3oms381ngfqsv/6129105798.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/2bvhm66ilqt85luma93somk1q3/natasexotogora.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/369b92749818011d9510fc1c7f8eac5a/18919843729.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/127ef602f30dccc19bd87b674832646e/mirezosazaj.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/e7491021648b82ada26be1527e44d6ec/jozisobe.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/pugugejevurusonibiru.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/rubuxesam.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/zukevote.pdfIn PDF document text
    • 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_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 10816 bytes
SHA-256: e997f03384d61955cc9705f113be3ae762bdf5442e32bf25a1f40ef600b0b520
font_01_sfnt_off00010f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 16888 bytes
SHA-256: d04de6c2f251a6f561003fef9c03d359c7faed6b09dd734adb3d7fbd271ef651
font_02_sfnt_off00013b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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