Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd5aa048b27b3ab…

MALICIOUS

PDF

77.3 KB Created: 2021-03-19 05:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cfa6b283a97230134e998e2af078c71a SHA-1: c1c464a264a5dc86c1d9a0a2c36ccbcd270d608e SHA-256: 2cd5aa048b27b3ab47a9197ba51d9e0617990cee76633ec676457b52c0a4d76f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URLs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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 https://kuzutuzo.ru/wix?keyword=tw+hunter+middle+school+basketball PDF link annotation
    • http://technodom11.com/mirazuzasudorutakoxivuvepb3zkw.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/the_vampire_diaries_season_8_episode_13.pdfIn PDF document text
    • https://simokodopegaliw.weebly.com/uploads/1/3/0/7/130776428/pewosinisoz-wonozanizemuwan-gagiwota.pdfIn PDF document text
    • http://pelistens.xyz/tonexowapemubi7640.pdfIn PDF document text
    • https://jafuxanabowam.weebly.com/uploads/1/3/5/3/135383447/ledusanugirumexa.pdfIn PDF document text
    • http://medyayazilimtr.com/best_online_wilderness_survival_coursepm6yk.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/38409007830.pdfIn PDF document text
    • http://kimujedat.mygamesonline.org/fafumenanesegoma.pdfIn PDF document text
    • https://lijuvimu.weebly.com/uploads/1/3/0/7/130775306/rowemevevofiri-kuziru.pdfIn PDF document text
    • https://pafegesufo.weebly.com/uploads/1/3/4/7/134719460/8975745.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_6f170d275de74269827f28c64bab7c1b.pdf?index=trueIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_3c2d348e79b54f03a6b94d10e10bec1e.pdf?index=trueIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_a5d5aa70248946b19980c5c2781b9e24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65bfa731-e9c0-4f7a-899d-d1647d8b4a42/scout_sniper_training_manual.pdfIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_f985550b7f9f4c4ea8b3308527c7b8f7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa5b36c-2ad8-4ab1-8e05-a6e2abe9ecf3/surugujifitadoxena.pdfIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_3f53feddb0cf477496f5921e6ce99788.pdf?index=trueIn PDF document text
    • https://621cd70f-1aca-46de-91df-1bd8162c3e90.filesusr.com/ugd/9f1ad6_ca69ace3e56c4dc1864ad201eba8aa8b.pdf?index=trueIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_df1fc7fc58e44785a110689655cb2438.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe0b3ae-af6a-4786-ac82-364b0789222d/libebugepebojav.pdfIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_d6d22504856b47d2bc1bc1cf102b75bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd302e0-4cc5-4d06-a03d-aa6f1839f7ba/gokegibodukafunovimabo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82F 5424 bytes
SHA-256: 1556fce2a7ba15f534ec365cf8f8f9fbfba2bc0294e1af40a8204d1a09de310f
font_01_sfnt_off0000ea7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 10484 bytes
SHA-256: b64a7e40427f7517bf1e07a58fbf59c27163929523513ee2091f677ed34429a4
font_02_sfnt_off00010eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB0 16632 bytes
SHA-256: d6aeca2d71d065aeba00d03c50d672d3ba05f186ce264dc70760bb3990d11dd0

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