Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b2030d3df09dbf…

MALICIOUS

PDF

83.6 KB Created: 2021-07-01 15:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fa2702f6d2b17b2f4c74f87148b0d41 SHA-1: 9b51dcd56f958c54894b13f02f7f20cc0e623c8a SHA-256: d2b2030d3df09dbf000613024dcba6b48c65ea075a8a1ed23c10c95069b9cd51
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many pointing to compromised WordPress sites, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and numerous URLs imply the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7213aae6a049c354d06bfc586c0a1dab/35456172138.pdf
    • http://zge-led.com/luodan/images/userfiles/file/fopoxijomuzukajubabonu.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089baf8a98d9---94883537598.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1ae7934be---pigiwaxapimusinimimi.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2df6f85ae67626c4ff14f4394e1bbfa6/selinebusizufogipo.pdf
    • https://rmp-traueranzeigen.de/cms/files/53681019555.pdf
    • http://computer-rudolstadt.de/upload/file/lisowoturigajesebufed.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/24991230077.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b5d3dd14d---xijodetabalowonid.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1356d93d5---97792319433.pdf
    • http://thunderstar.cn/userfiles/file/20210530021307960762981.pdf
    • http://learningkey.org/userfiles/38453546921.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/395926ec4c178f920eb9f618e1036a81/54646961664.pdf
    • http://aep-tc.com/cache/fck_files/file/93576234339.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a0603b966---norabiwetinizugidovor.pdf
    • http://falerisztika.hu/tmp/7043635182.pdf
    • http://akicgiyim.com/userfiles/file/35377074719.pdf
    • https://techson-cctv.com/upload/file/jetalumofe.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609455a3383d0---6560582011.pdf
    • http://madonnina.info/userfiles/files/panumupujagijuketekakot.pdf
    • https://kaptenhoki.info/contents//files/kakalebujurebagekonobik.pdf
    • https://dbjadow.pl/attachments/file/40345224634.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608586773738c---zegajam.pdf
    • http://bestbuyfromindia.com/userfiles/file/34549368694.pdf
    • http://spc1991.com/ckfinder/userfiles/files/55155035525.pdf
    • http://artin-intranet.com/ckupload/files/serisulosopenupol.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=let%27s+groove+tonight+share+the+spice+of+life
    • 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_off0000e1ec.bin
7d26bc5179018d1e8cd22f917a5e103d78050333884aae91e48fb8ef37b3f49c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 10816 bytes
font_01_sfnt_off0000fae4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 16792 bytes
font_02_sfnt_off000112f6.bin
15da7c4d3759424063bf6b2b024364ec3c71d2fa3fcf52ccfb597919df0e7833
pdf-font-stream PDF embedded font (sfnt) at offset 0x112F6 18096 bytes