Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffba52cf2b06d4ce…

MALICIOUS

PDF

73.4 KB Created: 2021-09-02 07:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 22bb5d569f845c9e451f71aacce19418 SHA-1: 21aa8a19ecf218e8daaf34106c418c54c856f34f SHA-256: ffba52cf2b06d4cea1437d79169771eeab3366d3b3cb0bdf45e612c9f2f19367
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings point towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://catamma.ru/uplcv?utm_term=all+types+of+wasps PDF link annotation
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf3f9d62c---32135023263.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5ab2519b7---44963341215.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/s7ccdehu7g6cj2iubpf3s0en36/nubopujajilogapanifufanur.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/loninomuwowisuwudekevil.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/n1k7psmb67vc580i6tm1l9pr34/sofelibugadedegufori.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/a3k1bu01kl6oqpgq2pmc3bu5cn/zomafanira.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/gaxitureneledezadazex.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2c791e0444---zidifut.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/kurivofadixewopusowi.pdfIn PDF document text
    • https://educhina.mn/editor/files/93615409872.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/161255b07c0ff7---72068013390.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/putinusetefuwipepubuteto.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/36305796869.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/c70f457ac3e9d2faca8dfd604587d990/96602916929.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3811be322e---99094010477.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/89450242375.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/756fd65903cb20d180689141e04d94a8/79645461460.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/33958845183.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia//files/xobapebakap.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/0a3dcaa17b072b9ddf246121a0554df4/64496371267.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/xagilubolomugebe.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/726710479.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a646b1240eb---zazagigikobaronuzupesubon.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/15834846814.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D1 15788 bytes
SHA-256: 9fcd4b88994f364ecd3fd6eed322bf09bd3b44178e888614c065d1338778b55e
font_01_sfnt_off0000e8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F0 10236 bytes
SHA-256: 566a5d28bfe710a242f36fd1c26b8cc5d299c44a69836f42fb15898a5d1715e9

Open this report in the interactive analyzer, or submit your own file for analysis.