Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc1fe95fc69fd30…

MALICIOUS

PDF

86.8 KB Created: 2021-06-29 11:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4bde0b0e778a506ebe54f9aff54fd4b8 SHA-1: cf10e39ce1674a3be2bee536fac84173d89c5421 SHA-256: abc1fe95fc69fd303d33412d85b4b8e4c8c65f781012e358c245517f95ac2e2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://littlepearlspublishing.in/data/eimages/file/40084205969.pdf
    • http://rainbowcaterers.in/userfiles/file/62798417250.pdf
    • https://alakharia.com/public_html/userfiles/file/32254514876.pdf
    • https://arrayamed.com/userfiles/file/gujekedo.pdf
    • https://porterbrothersltd.com/app/webroot/uploads/68787888347.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/rexedadorod.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c7987e9d8c5ac70d296425b3fec5d15a/75587477635.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/45816072906.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/3f2f7ef2ac830ffdd39eebed8381988f/gogusi.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074f92615386---toxipelefadowuvigeba.pdf
    • http://spalovnachemolak.sk/userfiles/file/wigutulefisufirofiguwali.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/ecfee842724d5798b648c710817bad16/87236556705.pdf
    • https://wita.lt/images/files/47558742105.pdf
    • http://rent2day.ca/ci2/userfiles/files/raxojolidarujijeda.pdf
    • https://searchlink.org/userfiles//file/22905121024.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea1cf044d---ziwepujogoxukok.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079fa279efe2---wepibixipopakuvapadibijel.pdf
    • https://pypconsultores.mx/userfiles/file/21003635665.pdf
    • https://study4student.com/cache/fck_files/file/xivezimapubalupobixa.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/23f8ce56a90362af334ec04a0200329e/xijuneritexigogokujuwe.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085be97867f5---27998249050.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882c1e3d1f8---80386675421.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f26c23aa7---26005514663.pdf
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/94246218873.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=tomato+plants+wilted+after+planting
    • 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_off0000f146.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 16792 bytes
font_01_sfnt_off0001095d.bin
3f131d37b466a697e2a068e4b354a9a324532963124fd6df094b5f8119412d36
pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 10892 bytes
font_02_sfnt_off0001225c.bin
6a2652864b57b0999a8ddcc1028556ef316fbe0238f9ac432ee6894383ded4c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1225C 16692 bytes