Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30bd6207f1e759a…

MALICIOUS

PDF

80.1 KB Created: 2021-05-24 16:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 62c27978fe0f786c75ed4845ab785ec1 SHA-1: ed5892561e33300f0d9569bffb5a6f935a7957d0 SHA-256: e30bd6207f1e759a396cf5f9c71eb15c01632a02e1bc579b9605caa1fb1152ed
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a site that appears to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to starting a business, aligning with the 'SE_INVOICE_LURE' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://golowaki.ru/strik?utm_term=how+do+you+start+a+self+employed+business PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482869/normal_60240c5bb5260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482617/normal_60527b81d14f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500895/normal_6005920722d39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497687/normal_6017277c72b82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385028/normal_5feb95181c037.pdfIn PDF document text
    • https://wafukereloxajof.weebly.com/uploads/1/3/5/3/135311523/torixogizakazed.pdfIn PDF document text
    • https://xefezabegeritaj.weebly.com/uploads/1/3/1/3/131379478/7277378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_60155b8eb3366.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/kegotaranirujoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/12acf931-060f-4962-94bc-b707930aed16/what_are_smart_goals_cbt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52e64e0e-ea11-4374-9d86-e5dc31b2d955/10900979508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92506ffe-396c-4576-ba53-37e4c3ce0c21/bexibosawodetureror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40da51e2-a841-4da9-beca-6cd47f277315/88317935228.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/33568731694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a4e619-9d6c-4aab-be1d-44ed2360a0b2/brother_p-touch_home__hobby_pt-65_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a2edb0b-f639-4e8d-9478-c5bff6cc9b22/the_book_of_thomas_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a4f394-58e8-4fb7-b056-7b9c28e31309/10499008682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795fa2f3-cdba-47fb-816f-a5dd6eab2c8d/kurefenena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4c4a83-c4bf-4cf9-82dd-2558641cecef/supelufodaku.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/13484976017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529309ef-63ae-4108-9bd1-fd7f5442d880/xenuzab.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 5480 bytes
SHA-256: ac37e7c3486ee88cb22a35c9c5d0e229abff0952a672fe3f5a74cd5bf8bf230b
font_01_sfnt_off00010e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E56 10620 bytes
SHA-256: b8b0fe7f29be79f60f33fba6b3689a351872c94a9b99b70ffee5bb2001d6c548

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