Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fe7e268768f001…

MALICIOUS

PDF

87.1 KB Created: 2021-06-30 19:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbd2d1536dbc8e8a34ea7d2b1945bf6d SHA-1: 03480123768876050f17635e912b0b247b22a464 SHA-256: c6fe7e268768f001a3c3281f5b544314ef64111fd0a012fbfb7fe08bf518529a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The presence of these links and the overall structure align with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/0373bef78fed48e0fdc36f25df9015e0/27023061900.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16094b4c35da00---wajapepisufuf.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de4706faf0---1966995448.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/2ffc48b895b36042a7b809bc67b6abc4/wexemefiwoputigaxikev.pdf
    • http://conelser.hu/fck_uploads/file/rojenewu.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080959eb823d---faxavirevezagubebi.pdf
    • http://sdds.be/userfiles/file/bunesafu.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fb886ddc4---23974836186.pdf
    • https://biovuspharma.net/userfiles/files/pagamawidituvufewakeboxi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096577429c1e---5778121089.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acbfa5106f0---jefogogonupaxibubizawik.pdf
    • http://interface-referencement.com/userfiles/file/78193738375.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/202ad0deb6e834f6163a153f2b09909a/fapebibozavibewitin.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e7d276590---nesaluwajo.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mf7c07scau0i792q2tbka3jg12/keranitik.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec5f7a1c79---51517711214.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608874c51398c---85077420031.pdf
    • http://nanobubblevietnam.com/uploads/userfiles/file/zifike.pdf
    • https://avgdesign.com/userfiles/file/xopuxobelafa.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/seaf7ph37e8mlb3fqbbuvkv1o5/tirusiretubolu.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/033eeb24bafcef9e4281011d26ac537c/53918924751.pdf
    • https://alajuusa.ee/media/contents/file/33172152684.pdf
    • http://pincailight.com/zk/UploadFile/file/2021062704004773499.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757c8ea7415---8987908156.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/7121cac4d02dab9516fb0678158c9548/zipasitoxuwiwogar.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=puppy+yellow+discharge
    • 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_off0000f217.bin
319fa4662aa096a0f666f6e6fec01c1f89995576c8e65ca6f43c688650fd0e7e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF217 16380 bytes
font_01_sfnt_off00011c87.bin
d21fe7906a5439219793a9ebcabf8b29dacea46781cc6f08311dd06208b6ab5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C87 10892 bytes
font_02_sfnt_off000135b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x135B6 16792 bytes