Malicious PDF — malware analysis report

Static analysis result for SHA-256 214102053ff38c7a…

MALICIOUS

PDF

76.8 KB Created: 2021-09-02 19:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c9af9cd9e82b8b8ba87174670fe66af SHA-1: 3d12a1cc9e3530d3546d5726a14f1c3cb56425bf SHA-256: 214102053ff38c7a0d3bd33b6b2fa5360a313c190840401aa2bc2a3ad7eb1b59
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The presence of embedded JavaScript and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://nabijdefossa.nl/upload/files/85998240367.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bed95fa238c---dirusejizixawosav.pdf
    • http://photo-preiss.com/upload_files/files/fexozamifexuninuzelase.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/83a620b72e469e8043d32cf2e73dab14/84277296482.pdf
    • https://izr.fr/files/favevewigevinoso.pdf
    • http://france-ex.com/images/blog//file/nopagegepaku.pdf
    • http://eurekaelearning.com/upload/news/file/jorik.pdf
    • http://bigsvatcharasith.com/userfiles/file/17049642518.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/jegiq604670son01t5v76hn955/55473588406.pdf
    • http://kurumakaitori-one.com/js/upload/files/68083473380.pdf
    • http://bularz-auto.pl/images/userfiles/file/69298897209.pdf
    • https://fidelishospice.com/ckfinder/userfiles/files/80889923609.pdf
    • https://qian-ho.com/upfiles/editor/files/3391757548.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-16/20210516223433515931.pdf
    • http://caydinhlang.net/userfiles/image/file/junuwusid.pdf
    • https://angkortaxiservice.com/userfiles/file/45598973471.pdf
    • http://somsit.com/ckfinder/userfiles/files/woxizakaw.pdf
    • http://3qbuy.com/CKEdit/upload/files/80381169358.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5b4bd5c1b---rufadejubipi.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/a9d27ngrgldftcrcf3a490nvf8/fujebenelivetetudona.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8131089d---kebidavuxanibopafuban.pdf
    • http://jew66.cn/fckimg/file/venopodetukukab.pdf
    • http://photo-preiss.com/upload_files/files/69167133445.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/s1o9s3etnl1tg4poi81ojtic23/jilur.pdf
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/330hc9s5kokbebgl203ih8ebe7/wobabadejemagurug.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/2nm7ouifspsfuce91esb2jder0/zafezomejajuvifi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=break+every+chain+lyrics+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_off0000c5f5.bin
2272af288e992be1e61f3043bd9366dc6b4cb197caa554f80731befcd840bdcc
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F5 17944 bytes
font_01_sfnt_off0000f460.bin
d6b1691d10bd66be8eed7beb35ee4672621073324b19257ed422d3b31c4bec72
pdf-font-stream PDF embedded font (sfnt) at offset 0xF460 10824 bytes
font_02_sfnt_off00010d4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4E 16792 bytes