Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ce9a751fc63358…

MALICIOUS

PDF

127.8 KB Created: 2021-06-26 02:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d181bb316c72a534738f6eff1e8f872 SHA-1: 3c16aa0e395885dd56e2331961eb185e141c460e SHA-256: d1ce9a751fc633587dac63efd206612a3e3a049cf130411b3aa1f260b089a1dc
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded links that point to various websites, many of which appear to be compromised WordPress installations. These links are structured as a link farm, suggesting an attempt to obscure the ultimate destination or to distribute a payload. The presence of a raw IP address in one of the URIs further indicates malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' supports the classification of this file as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8d1dbc7ac---zasijaxutupixagewidol.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3be0110d7---wodapi.pdf
    • http://gabortech.comadmin/file/67862701548.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a51dfbd635---99853887342.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/6b90cc49bccdb01d6d0f58ba77cc5d90/89006232830.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf5030587---lufojusaxurajitowosum.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4afa1fd8e---tipulixosuwixifej.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ee49dfb8e---41000430179.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/p839n0kvfvarbea5fj22sjipc7/fivaluguzotusetesujevima.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/322dqsu4gtiosgv21kvgh8je7b/muvipaw.pdf
    • http://4grd.com/cmsimages/file/gozakem.pdf
    • https://anjingliar2.com/contents//files/30136517466.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/8d9dcc219d3f45fd1685bd0820580888/70401620173.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c3f258763---38889028901.pdf
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/c5mqqauibnolvkjvtnt59dkf2o/tavigufivixobu.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160aad1add4c92---zebiwaru.pdf
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/8726eaa57d5b757b9b26316fa4fd7ff6/95212424222.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a9608132d---99758815128.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/9e6c56b460c694fd7e7d9948b8da951c/16308109679.pdf
    • https://bmw-zona.ru/uploads/file/vurowi.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f9ac26478---jujodufebopumadibedegub.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/k057levouve0paqm8epuevlse3/36926782014.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3jq7981rha6ejbq1lf4b64q2i3/16733805240.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16232452326448.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/b8012d3f8b398071306408687588f84b/totogatapufu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=minimum+physical+security+standards+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_off00019344.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x19344 16792 bytes
font_01_sfnt_off0001ab5b.bin
e93090d8881eeb8902ad66130b9cf213e9466ca648eced25cc189526b705c258
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB5B 10972 bytes
font_02_sfnt_off0001c49a.bin
87730efe91f744e3d48644a9b90d5ec99473d7c046ca3beebdcd3ce01b0c1395
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C49A 17160 bytes