Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3b88d201b337b5…

MALICIOUS

PDF

74.6 KB Created: 2021-03-24 21:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 071452b6d0fd0b3120f1f83ce741f574 SHA-1: 2f4d0c7ef02c94f52b5bd5eef6c164e4c1e654e7 SHA-256: dc3b88d201b337b5961857307ebe47c95dd1ab92509500ce60cb464f1b1da012
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 0.9998

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://midufefew.ru/123?utm_term=set+alarm+clock+in+android PDF link annotation
    • https://cdn.sqhk.co/lekibapufe/jbRxjgd/hit_the_bricks_5k_zionsville_results.pdfIn PDF document text
    • https://kibatujobed.weebly.com/uploads/1/3/4/7/134739754/9248414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491946/normal_604813226575c.pdfIn PDF document text
    • http://pewujok.mypressonline.com/82532757761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_600f14a6c5ff2.pdfIn PDF document text
    • https://cdn.sqhk.co/xezufulozuwo/ijb9Lja/tiktok_banjo_song_slowed.pdfIn PDF document text
    • https://rojisubul.weebly.com/uploads/1/3/4/5/134593633/a269ad98.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/que_harias_si_no_tuvieras_miedo_curso_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485308/normal_5fe952887fe5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tisudaxutuz.epizy.com/vendor_outstanding_aging_report_in_sap.pdfIn PDF document text
    • http://dixolasafu.epizy.com/45619448170.pdfIn PDF document text
    • http://kigagizotag.onlinewebshop.net/siniboz.pdfIn PDF document text
    • http://firuxafuxu.rf.gd/doragivumosusolufew.pdfIn PDF document text
    • http://nowimirozox.atwebpages.com/how_much_a_hvac_tech_make.pdfIn PDF document text
    • http://tinipolevuzow.epizy.com/36136205143.pdfIn PDF document text
    • http://wowulikuvej.rf.gd/how_to_make_a_small_business_in_australia.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_off0000e610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE610 5072 bytes
SHA-256: 6ca32c92eb5966e6d61c256fe49ca1bd92beb9268a03e5a5e65bff6d0674695b
font_01_sfnt_off0000f73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73A 11076 bytes
SHA-256: ea2bf33e5362fc8bdb3545cf15028ee0b303bf31495d14a23a6b07afc80cd42c

Open this report in the interactive analyzer, or submit your own file for analysis.