Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce39add9a91d5641…

MALICIOUS

PDF

78.2 KB Created: 2021-04-04 19:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 004ce423d7706b5fa89882f920aa7826 SHA-1: ad7aabc55e12b62caee5f302c364a264428d94c2 SHA-256: ce39add9a91d56419afe49f956112a79e494f7ca4a11cf382c1bcf2b5bcc96d9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to PDF files hosted on platforms like Weebly, suggesting an attempt to manipulate search engine results or distribute further malicious content. While no scripts were directly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://topepixifugop.weebly.com/uploads/1/3/4/3/134322533/nifadaga.pdf
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/wexoda.pdf
    • https://cdn.sqhk.co/letinumi/AGHhau2/tovixisudegasigefiwa.pdf
    • https://cdn.sqhk.co/vixukose/Dhp3ijf/becoming_a_certified_teacher_in_texas.pdf
    • https://tonibakak.weebly.com/uploads/1/3/5/3/135346506/nizezuwamul_gonepuraza_zujededufo.pdf
    • http://ellmax-site.xyz/vebujutudedefagafuno004hl.pdf
    • https://cdn-cms.f-static.net/uploads/4501961/normal_6040196e55488.pdf
    • https://cdn.sqhk.co/vixonafom/70zgg2G/daturububi.pdf
    • https://xugeguva.weebly.com/uploads/1/3/1/4/131438310/7151496.pdf
    • https://cdn-cms.f-static.net/uploads/4392220/normal_5fe7a99bddf2a.pdf
    • http://wonder-ita.space/zulatupegify1z1.pdf
    • http://reduslim-shop.site/acts_of_paul_and_thecla_greek6ux8f.pdf
    • https://cdn.sqhk.co/xudogafu/jihKngh/puzzle_and_dragons_gold_tamadra.pdf
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5ff5118f037b0.pdf
    • https://cdn-cms.f-static.net/uploads/4451230/normal_5fdb6d88a4044.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/4NO0L8wlyOA/wb?keyword=kitchenaid%20pro%20600%20bowl-lift%20stand%20mixer%20and%20cover
    • https://62dace35-232c-43a2-b3e8-6cf19ad57148.filesusr.com/ugd/42ae31_a397eecc66c145649c1160d1d8813ebd.pdf?index=true
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_7b6972bb7fd44d868de9edf797579974.pdf?index=true
    • https://3d73ec66-e24e-4607-99a5-aa3c333c10ea.filesusr.com/ugd/a96454_de28090692fd49a6a93430c035c22607.pdf?index=true
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_4b2400a2876e4f939403c42abdfe62c8.pdf?index=true
    • https://c779a0a5-5a96-4308-8c37-720837e0bdd2.filesusr.com/ugd/4f1d02_9d5325efc8114fad8326c887a6779267.pdf?index=true
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_717c5e2a30ab4ea1be24896e7e130acb.pdf?index=true
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_378164f9d32745509635ca97da5dfbc9.pdf?index=true
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_7c1800cec88f450589c549d169a5e94e.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa6.bin
54a6412859e26d2ba9c662b661a3aaae0d2d48de335ad989073c81c1032991a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 6052 bytes
font_01_sfnt_off00010435.bin
a5aca8868e701661f8311524d588b3f517d0a8163bbd01b03f8ebc4f2fc5f92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10435 11400 bytes

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