Malicious PDF — malware analysis report

Static analysis result for SHA-256 4701335effbba495…

MALICIOUS

PDF

70.7 KB Created: 2021-02-24 08:09:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 7d7504aa4af6fca53fe46bb30579a666 SHA-1: 9bda8847a9bb92e152219f67f3e9e4bfafd29088 SHA-256: 4701335effbba4951794cbbc87f1bf14c1fd33940b7aa98f7e52476df2f7fbe1
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The embedded URLs suggest an attempt to redirect users to sites hosting malware or phishing content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/wb?keyword=batman%20a%20death%20in%20the%20family%20movies PDF link annotation
    • http://cosmostil.top/dibogebl7k6u.pdfIn PDF document text
    • https://cdn.sqhk.co/fanabezom/Kcjdgfx/balolabososezotupejisa.pdfIn PDF document text
    • https://retelajipubo.weebly.com/uploads/1/3/4/7/134700068/84a73.pdfIn PDF document text
    • http://copyrights-notices-helps.com/farming_simulator_15_cheatsck82c.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/8309385.pdfIn PDF document text
    • https://cdn.sqhk.co/wivodojeg/YOVdPn4/wwe_network_sign_in_xbox_one.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/d5ca96406.pdfIn PDF document text
    • https://rivakevalitute.weebly.com/uploads/1/3/0/8/130813818/rogosas-koxubi-bupoxunap-bezesujejusamuw.pdfIn PDF document text
    • http://podarokinsta365.site/dc_ac_inverter_circuit_diagram0a233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poduzamilikuki.rf.gd/bangkok_shopping_mall_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/5383641695.pdfIn PDF document text
    • http://letituxis.epizy.com/very_good_morning_video.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/travel_agency_website_template_wordpress.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/vakuzavogajazezava.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/damudanafinuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/32229057124.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/10711015414.pdfIn PDF document text
    • http://dikubok.rf.gd/catholic_mass_songs_sheet_music.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_off0000d83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83F 5260 bytes
SHA-256: 42f9703121175c7cf390dd679b3dfb499baca9a03b4fbd326cc513a16d8851ca
font_01_sfnt_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 10404 bytes
SHA-256: f5f98ab73fb91914ba7d45fb990f614adbb4c45696a07b9f4cb5818479c99a48

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