Malicious PDF — malware analysis report

Static analysis result for SHA-256 95884cd34730088c…

MALICIOUS

PDF

94.8 KB Created: 2021-03-22 10:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 09223dcea8262a81265ccb81c27fbba5 SHA-1: 229a3d934055e010ea91d684989b8b450e1f0dd7 SHA-256: 95884cd34730088c4ef0b4a83dfef6ba4aa46e3d6698330f2de569974c0e1545
204 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm, and one specifically identified as an SEO redirector. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content, potentially leading to the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/strik?utm_term=star+trek+original+series+scripts+pdf PDF link annotation
    • http://microbladingeyebrowsdallastx.com/hp_6700_missing_or_failed_printheadefmfe.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/Ogcjdie/zezukunezavokexi.pdfIn PDF document text
    • https://cdn.sqhk.co/salozudat/heaoNia/apostrophes_in_contractions_and_plurals_worksheet.pdfIn PDF document text
    • http://ingmijn.com/wajukifavese4ibhe.pdfIn PDF document text
    • https://cdn.sqhk.co/dajeluparoso/gKjirij/rukagoli.pdfIn PDF document text
    • https://betebawaxudu.weebly.com/uploads/1/3/5/3/135388356/a0f78493901.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/kmRjeji/flight_attendant_jobs_las_vegas.pdfIn PDF document text
    • https://filewefoxu.weebly.com/uploads/1/3/4/7/134750201/ee61d6c1.pdfIn PDF document text
    • https://zozolexiwu.weebly.com/uploads/1/3/4/3/134343356/sefipadudixaw.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/donarepemi/craftsman_edger_trimmer_4.0_hp_carburetor.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/damowetikutupudotisov.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/83383754399.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/chopin_waltz_e_minor_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/safari_browser_folder.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/replacement_parts_for_baby_trend_sit_and_stand_stroller.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/87679186102.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/convention_biological_diversity.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/31656137324.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/47632778654.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_off000131a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A9 5492 bytes
SHA-256: 82c68c80964cf3c81a2f4a8dcc7e09875348b0c2e189ce256f94463761cf3825
font_01_sfnt_off0001446f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446F 12604 bytes
SHA-256: af379e7a8524b1f7714c14963e7d3d3d1403c3c66c9fc4c671ce00d3870e29bb