Malicious PDF — malware analysis report

Static analysis result for SHA-256 0764116aed1d1a80…

MALICIOUS

PDF

251.2 KB Created: 2021-06-26 21:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5c8cda6148895dbeb45088a93a3c0168 SHA-1: a33b7b3f891766729de22ce4063f79ba235adfca SHA-256: 0764116aed1d1a80a6e7628e31ee42d6e1c3520e7d7d637e724c4507dd53a8dd
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It utilizes SEO redirectors and links to compromised WordPress upload storage, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to trick users into downloading further malicious content, likely through a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

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
  • 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.
  • 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://telekommarketing.com/firme_data/files/bavokovitojegojoruf.pdf In PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e6f4418f3---ruvonurugib.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/75960835897.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/54763894214.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/1421aaccd3353f6aee64cbf4487d744d/gufodorezufoxapegawuloz.pdfIn PDF document text
    • http://gyobel.itpublic/file/lofoxujoxigojevegone.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/21394290261.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/mpppfo4qqnoe6ac536ah1hevah/zisazomosivevotapurufopo.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/s694vsb5qrksu8a4ss3g3o1r4p/dugamibamawawemawu.pdfIn PDF document text
    • http://lafayetteconnections.com/clients/52818/File/4331622027.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/utiqkjoc15f8as9q98lsl8g5j2/barinabaxixosokamunisa.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/0p7qaj2ruq48smhmjv9omv3g60/feselazo.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba15ec279e1---10882973180.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/2c3eecd9d5447291c45a4daf6f0d8f6d/24760218981.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086b8f7897bf---fakarikewetozex.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3234d74c65---ragolofavuteroti.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/98072e1d59046d22e2e4078da9f36b34/1290543527.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e7750dc89---jivipelogivavibejut.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/53180c43e613a3a1d4f26eb900f9ee48/wonogijisora.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/kabf3an0n0qba0p2n1i301du0v/kagovowipinapegarabawevar.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160772874af570---tibekatujesanodo.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/76da98d97890ae4ffb03f4bfbe916ece/86858001681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+build+a+ranch+house+in+minecraftPDF 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_off00036dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36DFE 20724 bytes
SHA-256: 2698440bc60234537dc68bf88116bf18df72b0beef4208d5416357f20e804015
font_01_sfnt_off0003a26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A26A 11060 bytes
SHA-256: 64c826e911977c9248d87c8966f1a17032a3fa00982c725b4ae39b5874d6fb39
font_02_sfnt_off0003bbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BBF1 2184 bytes
SHA-256: 8e68cbf211c48380df178dfab05fc2a3aeb12f5469ae1ee201f4f10d4e92d2cd
font_03_sfnt_off0003c5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C5C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1