Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ffef3140fcdd6ce…

MALICIOUS

PDF

67.6 KB Created: 2021-03-09 12:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 493e44f2f466e524cfcd7a355ef5e4e2 SHA-1: 0dde7ded66d97bdcc8fb7e27fe1c3a077f5e6a86 SHA-256: 6ffef3140fcdd6ceca84031f2ac18bce044b631fc46e552d881efa9c87db9a7d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting a malicious intent to drive traffic to potentially harmful sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

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/award?keyword=the+positive+attitude+development+workbook+pdf PDF link annotation
    • https://tisemadu.weebly.com/uploads/1/3/4/3/134387657/xonabejesipodabel.pdfIn PDF document text
    • https://lunipudazu.weebly.com/uploads/1/3/4/4/134462877/15cc8f5a4a88.pdfIn PDF document text
    • https://lidugozomamaxo.weebly.com/uploads/1/3/1/6/131606349/a18cef03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391893/normal_5fd5f812dd77c.pdfIn PDF document text
    • https://darojavanobize.weebly.com/uploads/1/3/4/8/134889586/bevidomejefe.pdfIn PDF document text
    • https://lirukasuk.weebly.com/uploads/1/3/0/7/130739032/1b6232.pdfIn PDF document text
    • https://zediruli.weebly.com/uploads/1/3/4/7/134725524/pazuzin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448980/normal_5fc7c563b183f.pdfIn PDF document text
    • https://pezibife.weebly.com/uploads/1/3/4/3/134376528/3073848.pdfIn PDF document text
    • http://fanuvazav.scienceontheweb.net/2808682817.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501993/normal_5fef7af29eb93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424036/normal_6014c802d5e58.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/kulalo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406223/normal_6004dab87ac10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sejakopa/how_to_sort_words_alphabetically_in_word.pdfIn PDF document text
    • http://paguxesij.myartsonline.com/kurunikokezapaf.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/kimewuweguxorikudulonukep.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/2769786555.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/13345724960.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/lang_leav_lullabies_review.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/vogup.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/16341977962.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/kudaxo.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_off0000cbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB6 5584 bytes
SHA-256: 8f608d9b98d0c2a04620d4388b127dbe4d64420b7bc038b43030fc594be6c414
font_01_sfnt_off0000de97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE97 9872 bytes
SHA-256: a8373104c83f6df7e8e41540836d1c2892a399618d40b9230a3371a2cd309501

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