Malicious PDF — malware analysis report

Static analysis result for SHA-256 19beef403fffbbdf…

MALICIOUS

PDF

84.2 KB Created: 2021-05-18 03:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 38a3d72bf11a2145ba31c7857eae9e1b SHA-1: 672e606bafc1431d4258120ad05e38150278de13 SHA-256: 19beef403fffbbdfc2b13883bbfadbc9a6878252927fe34fe5bde2b3a54460d3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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/strik?utm_term=field+visit+report+sample+word PDF link annotation
    • https://kizujaxaluw.weebly.com/uploads/1/3/4/3/134393650/b8318aaf93ac93a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374978/normal_5fe24f3723572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_606466a1d254d.pdfIn PDF document text
    • https://bovoladimuva.weebly.com/uploads/1/3/0/9/130970023/393682.pdfIn PDF document text
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/3fdb4ce95a0233.pdfIn PDF document text
    • http://xigosilefonaboj.iblogger.org/dujakulusixo.pdfIn PDF document text
    • http://padojuputiki.iblogger.org/5365403808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_6013b0aeeec9a.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/80634971349.pdfIn PDF document text
    • https://dopesitelubi.weebly.com/uploads/1/3/5/3/135307477/8593814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481671/normal_605928af60666.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wunenubomoge.epizy.com/the_last_of_us_2_gameplay_trailer_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/fodmap_food_list.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/free_mobile_antivirus.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/dslreports_speed_test_for_desktop.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/chrome_app_dark_mode_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/craftsman_5600_watt_generator_manual.pdfIn PDF document text
    • http://juruzimezez.rf.gd/hssc_clerk_answer_key_21_sep_2020.pdfIn PDF document text
    • http://kuxoxulid.epizy.com/rawizisuvomizudibuj.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/what_percentage_of_the_uk_police_is_black.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/12748916462.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/vugawuzenufife.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/58648811181.pdfIn PDF document text
    • http://jefudarok.rf.gd/four_row_cylindrical_roller_bearings_skf.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_off00010bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFF 5212 bytes
SHA-256: 7859843cac5755922430b91dfb9d595432a555b4221db6c2c4a966a1c7ee6541
font_01_sfnt_off00011db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB5 11096 bytes
SHA-256: c2dff3f408ae9f478d706dd5d226f26a5d8f606e908160fd784d3eadcfaa2ae6

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