Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7f5cfe7d284409…

MALICIOUS

PDF

92.0 KB Created: 2021-03-01 06:26:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0991aed7a6f6c1407cb588333e0269f6 SHA-1: 604d529a351ef811b4719df4d1270d59ddc1ba10 SHA-256: eb7f5cfe7d28440925f4d4fb67b97c9df7b9194d0e5a54ee75c39a52e3bb5aa7
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to drive traffic to various sites. One of the primary URLs, 'https://pelibifir.ru/123?utm_term=rudram+namakam+chamakam+benefits', is directly embedded and likely serves as the main lure. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://pelibifir.ru/123?utm_term=rudram+namakam+chamakam+benefits PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407813/normal_5ff9c9ab967ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483867/normal_5feced694780c.pdfIn PDF document text
    • http://niburufajanuto.sportsontheweb.net/what_are_the_stages_of_disaster_recovery.pdfIn PDF document text
    • https://lokugejepotag.weebly.com/uploads/1/3/4/3/134318746/7013656.pdfIn PDF document text
    • https://ponigeje.weebly.com/uploads/1/3/0/8/130874529/xotilerusej.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/55146206219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461777/normal_6023db5c9dd67.pdfIn PDF document text
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/1557914.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380699/normal_5fc994075c73b.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/38131200578.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/benulinibosiviwun.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/wakoduzafo.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/price_volume_mix_analysis_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/xafipumupisibebiwir.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/26648344443.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off000145b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x145B7 8476 bytes
SHA-256: fa577de62114c115e81c9f62bbff0e0ce72cbccfe3b0d2855750af83744c129d
font_00_sfnt_off0000ef5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5E 5440 bytes
SHA-256: 148ba18d5c6d0ae8a0ed3a1110e2e06d81c1d94b9b855d9524b9db34d5bbebf5
font_01_sfnt_off000101b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B7 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00010d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1B 10524 bytes
SHA-256: 08997f5cd99e194bffe2aed93ecf6e0f29fe54b566ba11ea5bc1eeb9fc459510
font_03_sfnt_off000130cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130CD 16076 bytes
SHA-256: fce21d86c2b5faa43a5619d6c859002d414ef8720c10ef6ba746f045f1b0bfa7

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