Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5212720a0c9da5…

MALICIOUS

PDF

92.6 KB Created: 2021-08-02 06:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e90f7ac14fb14ba823f1c19dbfe9845f SHA-1: 64460113acf4c51308d8da9f91e941ca29ceea62 SHA-256: bb5212720a0c9da5c21004cf963b408c691e5c899132596d2868a08ecff7f762
156 Risk Score

Malware Insights

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

This PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=anti+terrorist+shooting+game+mod+apk PDF link annotation
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/dn6dku2v91s11t45gvmicbvftk/xilaruwipufigaleboluga.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16090f3df71d83---53088446710.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/c98e431ddc040eedbd9cc0bf117bf64d/beveluweni.pdfIn PDF document text
    • https://aspirans.com/files/file/97474915046.pdfIn PDF document text
    • http://www.mediagrand.hu//data/editorfile/zuwutevivamoxufaxaj.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/f0si7al6ft3b180h61qhpe8t44/46322783903.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/tkct6kfs7limsu99utvu45pdf0/45948053648.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/50076091552.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/gigarevefupokomozuredibub.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/bosobob.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d860cdc543---94820431132.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086b077d6fdb---22460392946.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/55830195353.pdfIn PDF document text
    • http://izdo.org/img/userfiles/files/zutagikawus.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b84c0940e---68148150612.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/5kk7l1upjci43ar4t4jejo4nam/wodazeropazilogapexuz.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/c3bb255c67425ae57b1038f657db6cc0/poretepotedefawavewini.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20217255815584.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/30931691426.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fcab3b6e6---64645254027.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/dezeposofajirujuzi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 10864 bytes
SHA-256: b81114080e06591c4ebe637dba75a0aa500ff98f24494313c96f5b04c54c4e5b
font_01_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 18108 bytes
SHA-256: 948e1e7759f52a02ea02f51eb036f8c90cc3fc1e67a30f773cf8a74c1b6ce299
font_02_sfnt_off0001316e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001497f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1497F 17252 bytes
SHA-256: ef80f472a0d3db308717e7ea915962b61dcf03a89e8b4fd70b081689ca06765e

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