Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed208f3b33c2bf1c…

MALICIOUS

PDF

85.4 KB Created: 2021-03-11 13:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cee0d6af4da3c5d4d940998cdb8ab61e SHA-1: aec217d57de186aca684cbe7747849399d52c059 SHA-256: ed208f3b33c2bf1cbb75fe710ea3abe110fffb706088f56ca671097e6f6f8c7b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to SEO-optimized PDF farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' strongly suggest this. ClamAV also detected this file as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and linked URLs are indicative of malicious intent, likely leading to a second-stage download or credential harvesting.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=parkers+astrology+pdf PDF link annotation
    • http://juvozukatug.66ghz.com/kesesi.pdfIn PDF document text
    • https://kuwovewifinux.weebly.com/uploads/1/3/0/7/130775990/18a8deb.pdfIn PDF document text
    • http://pshcomonhere.xyz/76857911950wegrm.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/964668.pdfIn PDF document text
    • http://cardio-natural.info/formation_de_lhimalayahtyof.pdfIn PDF document text
    • http://qwonder.space/practically_speaking_downloadwx242.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/wamatasamegu/infernal_shrines_guide.pdfIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_725f86f2f6684a1f902e8eae07bc67e3.pdf?index=trueIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_2dcb973259c740b4a397c3188b350108.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/free_file_splitter_software.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/getamikuvetiduzapisezi.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/11852825651.pdfIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_b97363b299a04ba5b5f3ae1e0fc9a9f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/ankush_raja_new_bhojpuri_video_song.pdfIn PDF document text
    • http://vojapulipono.epizy.com/android_auto_update_apps_schedule.pdfIn PDF document text
    • http://mobotifiriw.epizy.com/draw_io_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/how_does_a_wire_transfer_work_internationally.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/business_plan_template_xlsx.pdfIn PDF document text
    • http://wimidisa.epizy.com/diablo_3_guide_season_17.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_off0001113e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113E 5376 bytes
SHA-256: 3840c418879d7c568d5c7df2995cff11eeadddda8b1c3e543346502c0a9957fa
font_01_sfnt_off000123a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A5 10720 bytes
SHA-256: 517b88a29967e7a56efd6d06f6705656cc3ec56ca0cb0c63e0f9b9e7f548bd4a

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