Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff0a26f7f791125…

MALICIOUS

PDF

72.1 KB Created: 2021-03-16 22:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5d4ba46ab1ade50aa4e39191c46afc35 SHA-1: f2fe1290acbaf788fb93b77f1fa9d2fc09f3df7a SHA-256: 6ff0a26f7f7911256966ddbf526e9a12fb769714d2935bdc0877f67407455a18
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://seumenha.ru/123?utm_term=blank+butterfly+life+cycle+template PDF link annotation
    • http://pifafixejizigu.scienceontheweb.net/vopakegazuwajeminisemina.pdfIn PDF document text
    • http://kigaruzolalo.mypressonline.com/ejemplos_de_agradecimientos_para_tesis.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/54707806344.pdfIn PDF document text
    • http://xogubafirugufa.iblogger.org/fisiopatologia_do_cancer_de_mama.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/84856114437.pdfIn PDF document text
    • http://nupubidodeje.22web.org/differential_scanning_calorimetry_ppt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e50428ae-6bba-4927-94a3-ae16bb95ebfb/zawivaziralixuxex.pdfIn PDF document text
    • http://makatorujiru.rf.gd/72277480889.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/65454644966.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/sosezivadapetop.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_828ab63225f14725bc0fea9a958afbf2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34257d96-8f0f-4022-8602-f36a9be787d0/repazudowefadina.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/20290568829.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/mofezodojiz.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/luguliwu.pdfIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_a5b24b15f5f24e1f826d1d9b2c5d6740.pdf?index=trueIn PDF document text
    • http://wiputopi.epizy.com/imperative_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/factoring_polynomials_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/laxmi_aarti_full_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/mugulinowufuxit.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/wabawewojodiwudepizok.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCB 5112 bytes
SHA-256: 89d568c987f4b703236b39b4ae51a7a85d99f270ac9d4e38726f0bc55a2e00cf
font_01_sfnt_off0000df24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF24 10556 bytes
SHA-256: a52fe4ad5c014e8f28e4619e419b7f7f2b9fe666372520d434d885007d3bbfa8
font_02_sfnt_off00010354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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