Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e878fc0a377262f…

MALICIOUS

PDF

74.5 KB Created: 2021-06-11 07:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6150c7fc89237f713d8ed286a92f25a8 SHA-1: bf037d3da9bbd5d41acb1c830d60d69753752467 SHA-256: 1e878fc0a377262fb11e55f14c0687ca3b189a271c21fd127cc5c479f6212c5b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of 'free fire apk ld player' in a URL indicates a lure for potentially unwanted software or phishing. ClamAV detection and ML classification confirm its malicious nature, likely serving as a dropper or phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://archism.ru/uplcv?utm_term=free+fire+apk+ld+player PDF link annotation
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/u7e63k5op0dka64u9nfo6hgf11/nofupotenodirokofopuju.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a455d88c6---84917941285.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c99d6310dbd6febc973ce4ff1b5d1dec/7876400708.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a79c79ea765---13861758202.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5427cac9e---7302008616.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/zufatanumepulitedisixiki.pdfIn PDF document text
    • http://mousike.it/img_ins/files/vujisufujetofifuwa.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8fac2ebc2---56349033570.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/m7r2il094iplae40s0q57ha6p7/93077134534.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/sumetulevanijen.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d56b77919---17505570166.pdfIn PDF document text
    • https://zzarosiscarampola.it/file/dofibizizozerubanoj.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9bc95d75b76272af6a6098484d62220f/vewetazudesen.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/84222950790.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/27a4a98d6ddad1b138461bc242688d16/31502889116.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/1p84b4s1j6shgdrmsntuo9ssje/kaboxetabupujeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE516 4980 bytes
SHA-256: b2a8c2845ed1effeab3f9c71d7b2820aa1573719295c4c0b0d9e007133a7f7e6
font_01_sfnt_off0000f626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF626 12644 bytes
SHA-256: 60af94346c7e107d5366d1d4cf2544f570f50e5887bd2f68cfeb1442a2c5bcc8