Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f30b89aebe85da1…

MALICIOUS

PDF

78.7 KB Created: 2021-06-30 12:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d64809f093e99a5fabe87aa910c9716f SHA-1: 1983a2f955b79dd1c2468897837c0efcee2bd151 SHA-256: 3f30b89aebe85da16b10aacb8b5c3238fd1cd3344c7d93adb4fdb98f322ba551
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://queure.ru/uplcv?utm_term=all+living+things+have
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/8aa61cf52042f4059c09616c6c6252ea/73947441432.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/f363e39vmk5d4isa2p631nnung/12906208660.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f2ea1157---84461438019.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/0nrsv5k6ku35i4k38bepkqjroj/88060880287.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5311483c2d---10803450410.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/aacc98f504641c1e9c0618bb4a944518/34198072112.pdf
    • http://jucal.es/images/file/2168252581.pdf
    • https://securityguardsupply.org/php/uploads/file/21250737811.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a974d2bc1---13462208605.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a12762ec8---gepaxafanolefido.pdf
    • http://kassa.pl/userfiles/file/46048477549.pdf
    • https://argumentua.com/i/file/nevanibirapukupojisix.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d20c3c2ce---76905828288.pdf
    • http://pekingtogo.com/uploads/files/10507553550.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/10ajrssj3svhkdjth6dk9a9ni3/63364140194.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a341abe7a---lazekoxumalamofun.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d8a90873e---32438340478.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16076eb65469cd---mepowebaxibajane.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad711f2d459---jefif.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/q0bm9h9si9npvvc7l4llh7ck9r/268848541.pdf
    • http://mazdooradda.com/userfiles/file/nadanotalomenulumebezubut.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9dac0ede1---92625297789.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/8083b924deb2a6640e2428fb93912500/jupajuxulozidujotaf.pdf
    • https://activepymes.com/pub/file/jevoturetamibokap.pdf
    • 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_off0000d2aa.bin
642c0fd189a7f6e38188c5759eb98945678c952e142a75ae53a515b38ee04c2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AA 16560 bytes
font_01_sfnt_off0000fd3c.bin
fc1c40e830e6fde7cf889fef834c54d764c3141b839bd08364b4639adf975880
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 10212 bytes
font_02_sfnt_off0001141d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1141D 16792 bytes