Malicious PDF — malware analysis report

Static analysis result for SHA-256 9277112740d119e1…

MALICIOUS

PDF

98.6 KB Created: 2021-06-30 03:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1bc9a12a404ed9de660b32159fa2b6bd SHA-1: 7a808649d71f23b764f03754e449434d05c7eb31 SHA-256: 9277112740d119e1e05b31c109d5c7bd5384f9827828ccf33fa99b7277b34d83
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/8fgtqf0nft1fajd8d7nvp6j3jv/bonine.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890fe6a5cf6---vawukom.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/9f91ab5fdde44c1c50bb14ff900ed343/13118197106.pdf
    • https://sjalikave.hu/pictures/file/94269569404.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae26f8d808a---5339906998.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/32ac7971629ecccbda0b3c92307d298c/fikitagil.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/e999545becad08500a8834636b2ee22d/53270868343.pdf
    • http://amandatour.ru/js/ckfinder/userfiles/files/84822048199.pdf
    • https://abofahed.com/userfiles/file/82630046422.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5011b8f25---tejatup.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e1d779750---74645092982.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a7538947b0a---zakaberavison.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085275011482---dobixotajenetufakubijan.pdf
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/fekikorotafudamuf.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd42f6a48c---bidaputixemoliserewa.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/4cb0996680b99411cc7c7a795b33c0c8/37221106360.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/95c662ecad01343bc84463fa970088ee/47627129142.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/60ff714a69769ee438aaa0dbc577a844/88854875526.pdf
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/71273603953.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/io56bmn0tbbs83df831g0kk6s0/garopafigojepege.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a762e6aa575---23817068676.pdf
    • https://codecs.roimages/file/93267931430.pdf
    • http://asbufestival.com/uploads/FCK_files/file/xezawatoxupofoweje.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb53a92018---97208902520.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16095001f4c6fd---56581934213.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=central+bank+act
    • 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_off00012127.bin
4432f011fe3a43877c5acf89d62d26e0d9ba9dce43d3ba6f45e5182047707786
pdf-font-stream PDF embedded font (sfnt) at offset 0x12127 17264 bytes
font_01_sfnt_off00014e53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E53 16792 bytes
font_02_sfnt_off0001666a.bin
97cc775656ccb1efa86275c0fc31b1825bac7ede9c1119a49456158027c5768a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1666A 10108 bytes