Malicious PDF — malware analysis report

Static analysis result for SHA-256 d184b53d6265d6e5…

MALICIOUS

PDF

115.2 KB Created: 2021-03-14 20:21:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f46091663a50055351c330b154e8c600 SHA-1: 8ae6307488697a9340d946d8c588ab3207a5b45b SHA-256: d184b53d6265d6e57705d9871b29b05806ea54748ae3fca07df39e687d3f35c8
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 0.9998

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://pelibifir.ru/wix?keyword=the+rise+of+fascist+dictatorships+worksheet+answers PDF link annotation
    • http://axecheat1.xyz/vesunaxodif6npo.pdfIn PDF document text
    • http://huaweistoreukr.xyz/buy_harry_potter_book_set_hardcover7m0fp.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/98356061515.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/orpheus_and_eurydice_myth_themeydlno.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/VijyR1O/domexupapetud.pdfIn PDF document text
    • https://niromovikusuzu.weebly.com/uploads/1/3/4/6/134651616/sowawibija-zixidoturubatuw-befilitusi.pdfIn PDF document text
    • http://dihtyar.online/which_shark_hoover_is_best_for_pet_hairmzjiz.pdfIn PDF document text
    • http://boldly-grow.com/bubonic_plague_historykhpoe.pdfIn PDF document text
    • http://wellwork.site/personality_development_across_the_lifespanbku4k.pdfIn PDF document text
    • http://voirly.xyz/ion_block_rocker_bluetooth_ipa56b_manualtbdpi.pdfIn PDF document text
    • http://shishkin-seed.xyz/the_travelers_gift_seven_decisions_that_determine_personal_success98o7j.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/jhgjdkQ/xewavateti.pdfIn PDF document text
    • https://povuwifapijolak.weebly.com/uploads/1/3/4/2/134265363/9ae54097b.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/iiia7jb/28127776840.pdfIn PDF document text
    • http://it50save.info/54807732038imar9.pdfIn PDF document text
    • https://serivuzoforin.weebly.com/uploads/1/3/4/3/134334639/6952263.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/spt_air_conditioner_wa-1220e_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/best_gutter_guards_consumer_reports_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/55488417650.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_off000183c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183C5 5316 bytes
SHA-256: d998381ed5296df16da7baacf2ad74614df71c1de0dd745d12c5ede370435912
font_01_sfnt_off000195e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195E5 12900 bytes
SHA-256: 0e50749524bd92c078d6354ca6453d299bbbf774b66b0591f56debb026ae9064

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