Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e295f5961e9318…

MALICIOUS

PDF

119.1 KB Created: 2021-02-26 07:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: de28e7c3557d934d8fc99728dc823463 SHA-1: 480b092101de2c3cd27833f00acfe65bfded1f06 SHA-256: 36e295f5961e93188d461445cb4faf7ae44cd8f767f49fd6b0a7034f2fc9e4de
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting it functions as a link farm or phishing lure. The 'Pocket guide on first aid pdf' title is likely a pretext to entice users to click on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/wix?keyword=pocket+guide+on+first+aid+pdf PDF link annotation
    • http://mavpa.fun/harford_county_sheriff_reportsus38q.pdfIn PDF document text
    • http://myyshooop227.site/90662454176r6bnw.pdfIn PDF document text
    • http://rocketdocs.us/japan_tsunami_2004_informatione6o4b.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/must_watch_anime_series_all_time.pdfIn PDF document text
    • http://maxonona.22web.org/91744688794.pdfIn PDF document text
    • http://jakor.pro/7548587096466az2.pdfIn PDF document text
    • http://zebarugusi.22web.org/is_lemony_snicket_married.pdfIn PDF document text
    • http://itabody.space/401958886850j1i7.pdfIn PDF document text
    • http://sokolov.fun/sokajikiveju7ya7j.pdfIn PDF document text
    • http://vuxijagodoku.22web.org/26569800889.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/lasejedoxibub.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/14410400442.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikoliduxa.atwebpages.com/2784434126.pdfIn PDF document text
    • http://nufudojor.epizy.com/wolf_double_wall_oven_prices.pdfIn PDF document text
    • http://gegawuwiru.epizy.com/dopepiku.pdfIn PDF document text
    • http://xubexiv.epizy.com/the_lady_or_the_tiger_summary_shmoop.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/toviraniwilolovod.pdfIn PDF document text
    • http://jepafuzezax.epizy.com/lupazojuwegekit.pdfIn PDF document text
    • http://lizuratudesaxop.epizy.com/making_inference_worksheet_grade_1.pdfIn PDF document text
    • http://madulisi.epizy.com/happy_birthday_ashu_name_video_song.pdfIn PDF document text
    • http://lupemuvuxetamok.epizy.com/25005107364.pdfIn PDF document text
    • http://tinuzutajalik.epizy.com/58745547832.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_off0001998f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1998F 5356 bytes
SHA-256: 755ff33fe5fce4001a7d7493f3074a8cb0990ee435c46fcd2479a3b81fb74c97
font_01_sfnt_off0001abe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABE1 10240 bytes
SHA-256: 95e31c39332b9e1ecda91336be86355d989176d61097a3b25596dca92bccd27d

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