Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1216c396ad8cde3…

MALICIOUS

PDF

89.5 KB Created: 2021-02-25 22:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 198efa4c398c67a859e87dfe1cac965d SHA-1: c22f5b4beab1557f7cf52cd2781630bf8a719ad2 SHA-256: e1216c396ad8cde39e4475db03bd067d9027c94613c930c6e84848971b80ae1c
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic to attract users searching for specific terms like 'fifa 11 apk data'. The presence of a critical heuristic firing for PDF_SEO_LINK_FARM and ClamAV detection indicates malicious intent, likely to distribute malware or phishing content. The embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

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://seumenha.ru/wix?keyword=fifa+11+apk+data PDF link annotation
    • http://worldthailand.fun/gapumexavavovugunejr1kba.pdfIn PDF document text
    • http://mimasajikataza.iblogger.org/tavajamemi.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/94449067496.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/computer_systems_analyst_degree.pdfIn PDF document text
    • https://walamezer.weebly.com/uploads/1/3/0/7/130740591/23cc00ad9f.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/teboxulawukexipat.pdfIn PDF document text
    • https://bukudavura.weebly.com/uploads/1/3/0/7/130739260/3efb4eb3481.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/rain_dial_rd_600_manual.pdfIn PDF document text
    • https://vawigaxonisas.weebly.com/uploads/1/3/1/4/131438461/pitilufuno_fojoxazudugubu_kozipiru.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/download_excel_2013_free_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xewewiwuxadul.rf.gd/video_maker_android_without_watermark.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/bapojamo.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/29582436599.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/51178296596.pdfIn PDF document text
    • http://wifepex.rf.gd/mepifegejakabakinejewo.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/auto_reply_email_format_for_leave.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/91337448514.pdfIn PDF document text
    • http://felalosekubav.epizy.com/industry_report_definition.pdfIn PDF document text
    • http://lopamosetumug.epizy.com/bajagobagoma.pdfIn PDF document text
    • http://pikuvideposem.epizy.com/bleach_safety_data_sheet_domestos.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_off000123a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A7 4800 bytes
SHA-256: 7bfb19a5025d488e634057c5abdc5144c65af246ce673e1f9e5d4f9bad40f245
font_01_sfnt_off0001341f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341F 10892 bytes
SHA-256: fb440bc75d4968cdf2821b2891134f92951a978c4bf99dbcd7c11501d0c85adb

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