Malicious PDF — malware analysis report

Static analysis result for SHA-256 d207071b1770d2bd…

MALICIOUS

PDF

87.6 KB Created: 2021-06-27 20:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fdba86b9787fabd877ab3f2eef39b313 SHA-1: 3e277bf87501a02a2bcf03cd86d813037d17a825 SHA-256: d207071b1770d2bd169024e983a3e3c1a4c9d4c6cedf9ab2a15d0c4c48ef740e
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

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 https://wastran.ru/uplcv?utm_term=how+can+i+read+malayalam+books+online+for+free
    • http://erbaytag.com/resimler/files/13468589030.pdf
    • http://xn--szabowski-tub.pl/userfiles/file/45429532651.pdf
    • https://blindnow.com/userfiles/file/71404764815.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8b053af7b---6500907127.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ench62vfub6mug4vjlgukt0m75/beguve.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c662f903325---gibufigil.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/8fmfrk1579d969q7capg9hap9o/68945316630.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/fc2bfeb34abef8c5d470b005a4a42cab/xawibegufuvewujirase.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5877390502---mugom.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2d41957c4---81883961616.pdf
    • http://lblussana.it/images/file/95976371518.pdf
    • http://intergeored.com/upload/File/sufivomux.pdf
    • https://kovosluzba-praha.cz/res/file/22232794136.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160906f8f5ce1c---84723986827.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/3dd444c97d4380a3ca59792ef3df1cd4/pewininimokosofexik.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf4f089a96---77563494817.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cba40acdb---85691218725.pdf
    • http://shhs69reunions.com/clients/e/e9/e92da0bc0099326815942f81a5c18dfc/File/tavorapidotirafogomin.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/b5ca218842d123222629214533518e9d/89733476858.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/haf1hpmbj4mvfo5er4i4eue0r2/78573717830.pdf
    • https://unitjaya.com/contents//files/fuwikuzonazazubufusu.pdf
    • http://grandinhr.eu/images/user/file/giren.pdf
    • http://automsystem.com/UploadFile/file/20210524054308757.pdf
    • http://safeabortionnepal.com/userfiles/file/28335947069.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_off0000f238.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 16792 bytes
font_01_sfnt_off00010a4a.bin
f3f728673e8da9b5b0ff30f9d8438d4ec74681c46bba4af9740132345c45a163
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4A 17400 bytes
font_02_sfnt_off00013742.bin
e64ba573de6da0f6bb0be749b03666b657f46419cb1f10937970eaf38ab59818
pdf-font-stream PDF embedded font (sfnt) at offset 0x13742 10960 bytes