Malicious PDF — malware analysis report

Static analysis result for SHA-256 1982ff9458610081…

MALICIOUS

PDF

104.9 KB Created: 2021-06-29 09:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dbfa188b8dfc9256af56a3f43336f49b SHA-1: 99d0d8769fa5e1e62ea5f2612ad8a31f27cbd36d SHA-256: 1982ff9458610081afe2f81bfb9803a2a4ea0d15d67eba0dcb2e8e38a2abb08c
176 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress installations, suggesting it's designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://clubselectionvoyages.com/images/file/bevugisedinorupu.pdf
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/pn7p25ele9inqkg8ssa1gmjra8/57823521684.pdf
    • http://actlogistic.vn/upload/editor/files/bakonizekazowixaketumej.pdf
    • http://flambotour.it/themes/userfiles//files/2416372999.pdf
    • http://residencecarlofelice.com/userfiles/files/litowijapit.pdf
    • http://liburnia.pl/userfiles/file/47518741892.pdf
    • http://munsusa.org/userfiles/file/20210628033137.pdf
    • http://amandatravel.com/userfiles/file/4173201118.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824bac1c4e3---87713947660.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5cc769660---35431018549.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31efac758e---saxowivaruzibobizenuduza.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe9b1609f9---nerojuzivezasadisuviloju.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9f843fb917ea5d452f092fbad966f3d9/47782243915.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073b85dacc76---33947452151.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b1facc323---vivugixuvozepopotomole.pdf
    • https://atraba-holding.com/userfiles/file/jazex.pdf
    • http://wxhsbl.com/ckfinder/userfiles/files/20210625_035918.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/39890b68db23bc68855d47d909225411/83574151065.pdf
    • http://nesemlak.com/test/images/uploads/files/kitenerodowewunumud.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d308442b23---55853657696.pdf
    • https://brianhigbielaw.com/UserFiles/file/zowovusuwudu.pdf
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/63990764713.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/e6da28fc61203c7fb58da7e0811d9a43/powifemokefepimi.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f274f1c03a---tejopaj.pdf
    • http://alpha-cp.com/userfiles/file/jesomex.pdf
    • http://skyline1968.com/clients/74864/File/17106853794.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756eadd03f1---tojibewipidesuzaxe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=rs+aggarwal+class+9+chapter+2+solution
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120c8.bin
450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120C8 16088 bytes
font_01_sfnt_off000135f9.bin
c14401a63c08cc158dcbb4c598769c7236e687222845d782c21e671317253876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135F9 17040 bytes
font_02_sfnt_off000162ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x162FF 16792 bytes
font_03_sfnt_off00017b16.bin
c641898520b0693b537a2fe15c88cd993c98b532d0f490d9521229e51e205732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B16 11172 bytes

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