Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a62c9f7f2afb10c…

MALICIOUS

PDF

77.7 KB Created: 2021-02-25 08:26:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e63abbab4ec377929760b303a4bf93e0 SHA-1: b58afe164319130bd2c483027f0248e413423c97 SHA-256: 9a62c9f7f2afb10c58d492bcf8f52bb8dd4f678b965a2454db39afec4a3ec033
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised as a search result for a thermostat manual. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=white+rodgers+thermostat+manual+1f78+reset In PDF document text
    • http://tulomodev.getenjoyment.net/87951735936.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/6th_grade_math_fun_worksheets.pdfIn PDF document text
    • http://hesap-al-sat.com/cell_biology_quiz_questions_and_answersckwms.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/falipobazofudutozoseba.pdfIn PDF document text
    • http://busforpay.online/iran_pro_league_table_soccerwaym1l5q.pdfIn PDF document text
    • http://losqutoq.online/nifajinetofasosekamuwuttwyh.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/how_to_charge_minn_kota_battery.pdfIn PDF document text
    • http://wiregabjuk.fun/simile_and_metaphor_worksheets_teskk4na.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/why_is_the_gnostic_theology_rejected.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/how_to_draw_a_full_moon_easy.pdfIn PDF document text
    • http://reduslim-italia.website/usanetwork_activate_nbc_fire_tvd5sdk.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/sazariwapa/ibm_serverguide_windows_server_2008.pdfIn PDF document text
    • http://zagizub.rf.gd/daud_ki_chori_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/windows_10_free_upgrade_from_windows_7_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/100_startups_to_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/20513868342.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_off0000f094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF094 5660 bytes
SHA-256: 7d42903a5d7ddc8403923c2a6908b991861dc9e656d3d1473ed849e89e927449
font_01_sfnt_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 10972 bytes
SHA-256: 3d27e9d2f0953829625c5967ba62f2cc7e43766a563c141001d375350f90c0e7

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