Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afccd78da08ef19…

MALICIOUS

PDF

437.9 KB Created: 2021-06-26 05:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cd5092161e6502fc12ff2b15d5dd0fc1 SHA-1: 7bc4bb6636eed6c3b2602761c31113c3fea9f02c SHA-256: 5afccd78da08ef19c458f9772396230c597d32d2060ec3d8c01c251e1c69ce2e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a SE_INVOICE_LURE heuristic firing, indicating it is designed as a fake invoice or payment scam. It also contains multiple PDF_URI and PDF_SEO_UTM_REDIRECTOR_LINK firings pointing to external URLs, suggesting the document attempts to redirect users to a phishing site. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8376

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/dut48uhui007mknhd6nr2g3ot2/rubomoburexefotamofuvare.pdf In PDF document text
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/43614260533.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6897dc36f---rinuvobogemutetuvotax.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086b248d6363---rugar.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/64637692398.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/7034892496.pdfIn PDF document text
    • https://murtenhof.ch/userfiles/files/sivomiv.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/565d36aca2e7bf9b5fe9de99764c1a8d/79210775213.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/memevudakuxop.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/4h03o9tl125tlg6ebms10gljad/dipurebaxe.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080f36a90389---jonudu.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/3jsqi9qb8s8v060n0405rq4pfr/nowumixavomuxokod.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b78b6bbc10---mubal.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/bg1lih3glokgc4o4sqbm269nsd/63565879590.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/4trnrb6jumgvf4rd9h85tmlh25/wizutepuregu.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/34786095525.pdfIn PDF document text
    • https://cargotavio.ru/files/file/wifazaxusenubifotetamik.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/nivelejudojiji.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4072454e47---27533704937.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/1ce6vg4pbci8f58r776hst34b2/15475681178.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/2bb684ca9e4114fd8992085686a15e4d/12968201301.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094bee94b5f6---27728793928.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=daniel+5+commentaryPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00062fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD2 10472 bytes
SHA-256: a93a2bd8c7439f0a09a58189e06e9006bc7dfcc0731d75089fe3b32561f71eae
font_01_sfnt_off0006479f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6479F 19448 bytes
SHA-256: 587ae32eae0b91f82e9fa3857daa272cac8b8562768f62d5f6ef82a2a11f3187
font_02_sfnt_off00066814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66814 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00068026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68026 32344 bytes
SHA-256: 2061932ccfe0038280feadd7cdd7243f25d6870ac3f19b95b54dbd25b8e284cf

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