Malicious PDF — malware analysis report

Static analysis result for SHA-256 671029778bc6843f…

MALICIOUS

PDF

74.8 KB Created: 2021-03-02 17:32:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b814a9c75c3aaec489af40d5b30baf36 SHA-1: dcb7c949c8ac5ef908459255e7395a16c7a5da6f SHA-256: 671029778bc6843f94c361e83f0adb5a7f654737774aa37a37a75d026fdc5783
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to manipulate search engine results or direct users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to lure users to external, potentially harmful, sites.

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 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.
  • 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://baarspo.ru/strik?utm_term=kangertech+evod+usb+not+working PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393904/normal_5fddf477cb7ea.pdfIn PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/a98c075bf.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/a7gjejf/ace_racing_turbo.pdfIn PDF document text
    • https://jurogewogil.weebly.com/uploads/1/3/4/3/134318518/3885215.pdfIn PDF document text
    • http://igcopyrightforhelps.com/210878555321judu.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/fojivojawovaposor.pdfIn PDF document text
    • https://cdn.sqhk.co/vakusukereju/v1bygiI/gubum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389797/normal_5fcd737f29462.pdfIn PDF document text
    • https://sujoxiwu.weebly.com/uploads/1/3/4/8/134879933/61078bc.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/legolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492246/normal_6029d185a6f04.pdfIn PDF document text
    • http://magnitoli-2ekran.site/how_do_i_turn_on_my_williams_wall_heatergagzs.pdfIn PDF document text
    • http://rusherx.studio/how_much_is_a_dvr_subscription_on_xfinityzzt9p.pdfIn PDF document text
    • https://kubazabuz.weebly.com/uploads/1/3/4/8/134885093/bidujevulig.pdfIn PDF document text
    • http://a-trvl.ru/consumer_reports_wine_refrigeratorssmds6.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/zoromexemuzid/letter_sounds_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/odia_kohinoor_calendar_2019_file.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/sidajisedamewidadujawaj.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82D 5492 bytes
SHA-256: f0c8b246e61323fe103adde553c9b5e1f1267764d58109c5695c0d7512a2d3da
font_01_sfnt_off0000fae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE9 10308 bytes
SHA-256: 3e52ed2e57f17762d78828758ad4361a4fa785a622ae424c85effdd8ebe97c6a

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