Malicious PDF — malware analysis report

Static analysis result for SHA-256 501e5cc435b0826a…

MALICIOUS

PDF

76.5 KB Created: 2021-04-06 10:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4579db449dc7e5e03a5e94767240eb82 SHA-1: 78504d051e0caa6aaa8539ddd024acbb0a7f9385 SHA-256: 501e5cc435b0826abc2d18797bbb5ee88852ad64b66c3fbdb62e61d31f4592f1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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.
  • 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://resalured.ru/123?utm_term=2019+acura+mdx+hybrid+owners+manual PDF link annotation
    • http://winovigamaj.mygamesonline.org/waxumofosupe.pdfIn PDF document text
    • http://gazupoz.sportsontheweb.net/applied_arts_magazine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_6068fb951f465.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/ghgjeKX/valipezuna.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/105463.pdfIn PDF document text
    • http://sakaxek.mygamesonline.org/alta_via_1_dolomites.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476782/normal_605f700e0e9fd.pdfIn PDF document text
    • https://cdn.sqhk.co/najafizox/nPgchhz/lodef.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/kfc_double_down_nutrition_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/buzovegom/5geLMie/murder_mystery_2_script_gui.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/j81KaMv/the_university_of_hong_kong_acceptance_rate.pdfIn PDF document text
    • http://popisazono.getenjoyment.net/applied_statistics_analysis_of_variance_and_regression.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_6062f0f75030f.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/journal_article_critique_sample.pdfIn PDF document text
    • https://jogelobob.weebly.com/uploads/1/3/5/9/135961552/xabubozugibodideboku.pdfIn PDF document text
    • https://bifepafu.weebly.com/uploads/1/3/5/3/135315465/koxofejogolag.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/hRqljjA/razer_kraken_headset_setup.pdfIn PDF document text
    • https://wenutezow.weebly.com/uploads/1/3/5/4/135400756/zinixuxetiruzuw_kuravozopipij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/problemas_sociales_concepto.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/british_columbia_road_map.pdfIn PDF document text
    • http://gubadif.myartsonline.com/abc_s_of_sleep_cara.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/71060315668.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/likimiserutudonufi.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/labofawusugadujopo.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_off0000ea04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA04 5968 bytes
SHA-256: 83009d97f6ac74a7a9d63b52891872e0b80f1caf75643c71e67ba82466d7d99b
font_01_sfnt_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 11212 bytes
SHA-256: 7afa40b7c57b970cd2ca7cb16b327e8544f030843c3d17b6831aaf9ee35bb1b7

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