Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad2245dfdd4c0bc…

MALICIOUS

PDF

79.9 KB Created: 2021-09-08 09:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 87a4599337c7318b1f4f7a953ba15f4d SHA-1: 99bbaee0ff9dc107115fe96348a4fd1733192d6b SHA-256: aad2245dfdd4c0bc8f74f3639a1d6b87cd53f591c4ae69c731eee5adffd7a975
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The document body is unreadable, but the presence of numerous external links is the primary indicator of its malicious function.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://thibangoto.com/app/webroot/uploads/files/lagatixamotadatuwesafo.pdf In PDF document text
    • http://riskhedgetech.com/uploaded/file/137441447760aeb8e05ccf9.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/d5101974e1305686321628c539d7f471/sutoruxopuva.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/269b8bfb1b041f8cd3dcd55583314514/dixasutolavetegetusopiz.pdfIn PDF document text
    • http://hyperasp.net/userfiles/file/91881442405.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/15074092701.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16242656172388.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098df73438e9---62506150166.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92cdde8063---79588938865.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ccddbc5e889---58468150262.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/13930832718.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e550429a49a---91900689150.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/gusidebozaximimowoxe.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/362c20bdd781e0fb9c8f768c04abeab3/bulobuvopalinanezuxu.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/makasexuwexo.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/gepetijaxarovimadukedoje.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14695b98b1---famobitopatobavoruv.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/64639211325.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/nununutid.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/e0c33071ed04f057ac7629ca4302a852/65331969868.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/69cec597ee55a980969a670abb9e6688/83823155675.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/wujawafademetuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=two+word+verbs+in+english+pdfPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFA 16416 bytes
SHA-256: 0a7c40006fc27d51153b21d6a48ea79a8c7f146cc8b15030b343ea684e52a4c8
font_01_sfnt_off0000d4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B5 10772 bytes
SHA-256: 0ae967961598632e8e40de26604a0f03b02cc2d290e761de0518a508cd825cb2
font_02_sfnt_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001050a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050A 16828 bytes
SHA-256: 42cca2b5f8ddedbd7b024cfdef98dd353c488fbe66d7de4ffd72683f9e177bc5

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