Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4d345bb5e2957f…

MALICIOUS

PDF

74.9 KB Created: 2021-04-03 06:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 39e7c24af6631c5d8c1aa41af2ea7782 SHA-1: dec16290ecce8ec106c91a9e6ddf13bfd1ab1e08 SHA-256: 3f4d345bb5e2957f49598738c9a7bd5656818a15c7ab757936ae62c60dae39dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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 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://xajibur.ru/strik?utm_term=2013+jeep+grand+cherokee+pcm+replacement PDF link annotation
    • http://markettop.pro/jegalifofoya9xa.pdfIn PDF document text
    • http://tomogorman.com/phonemic_awareness_strategies_for_second_gradeintsu.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/9704551329utlfg.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://creditreportfast.info/lawopalanubamifigotuso4llwh.pdfIn PDF document text
    • http://bolipoloweda.mygamesonline.org/aquelarre_rol.pdfIn PDF document text
    • http://mabay.fun/69908119108e11ix.pdfIn PDF document text
    • https://cdn.sqhk.co/mogilirexexa/gzNydQP/jovafemosejupazojuxap.pdfIn PDF document text
    • http://jezugelevafebir.22web.org/6004826399.pdfIn PDF document text
    • https://cdn.sqhk.co/tijatabov/jgijUmM/buburefat.pdfIn PDF document text
    • http://samozanyat.info/how_to_answer_jitterbug_smartphoneeb1uf.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/multiplying_fractions_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/jdjdihc/how_to_use_spotify_on_wear_os.pdfIn PDF document text
    • http://waxopuvuru.22web.org/48423441406.pdfIn PDF document text
    • http://natur-bio.space/word_cookies_cranberry_15_answerso75q0.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/96926731708.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/25167908392.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/gchdjaG/lolegafofapolad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejojivusuze.rf.gd/socialismo_utopico_e_cientifico.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/bezufizatixogarogob.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/variables_in_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/adada_adada_tamil_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/ymca_indian_guides_richmond_va.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/how_to_study_microbiology_medical_school.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C0 5844 bytes
SHA-256: 2f1c0c289c267463052bdedb94bd596c3670dde9e21f13510a0c836ac47dc148
font_01_sfnt_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 10780 bytes
SHA-256: e483c6387af438c64ff8461a172579d7ca51ec533aa85f995f2ab96acc2def9b

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