Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a6e300ee268a2b…

MALICIOUS

PDF

311.4 KB Created: 2021-06-25 00:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fcd48e77c2f69f34647dd46a25e9be3c SHA-1: e6f064be8309233ece5145d4a4e79e587773dfa8 SHA-256: 73a6e300ee268a2b693f11ec88087f4396835804c7146991886da6627ce62294
166 Risk Score

Malware Insights

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

The sample is a PDF document that contains a link farm pointing to compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document likely instructs the user to download an archive, which is often used to bypass gateway security. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://pamat.ro/UserFiles/file/76210180499.pdf In PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/7iic5fmg6grah8ldg6dasqcrs3/4021034116.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/56e35d6c13f2aed9e6cbf95df5fc6198/pivemupakasolixulib.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093cf7166728---xutogum.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c091abb2c---69398111420.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/77462097961.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b6ac29300---banit.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/56127190431.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/277ae38508238cf9ba19ab7397b5a6a3/difagagopibidazudem.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/392ae72b4a3cb3c137380158f4cb1b5c/41195881431.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073313e91c5b---33342602331.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/14218445d096f7466e9d58ccc0cd8a33/zudogisepaxewevaweruv.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/2bd4005a4b67433b4b186efba76f9626/35177141660.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0ff9efcac---86707836698.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/ec9794bbd34d931962aefbd84e1483d5/jusuguwatonemejoxa.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e099ae263---35266098123.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/chsl7pf93f9mt562fsddqjbn18/wakibema.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=kanye+west+ye+rarPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00049295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49295 4808 bytes
SHA-256: 5bc5e52856bf15f27036ec584a3ba62115a65003b7a420a97f708a090ea307f9
font_01_sfnt_off0004a31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A31A 13276 bytes
SHA-256: 81df47d41ea4e5b0f3ca9f0666678d0e5b08773abd89c907b3cf97ab5c9797a8