Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8adb9979a3b225…

MALICIOUS

PDF

80.2 KB Created: 2021-03-17 03:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 70bea7b3fc1464898b6aa715b6629d62 SHA-1: bd22848efbdfa5d544d5cd9d3b78104f88340e26 SHA-256: 8a8adb9979a3b225e4bb17b3a38ca3c7aa1c86d89929dd8a4150ecb21711ab38
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-severity heuristic indicating an image lure linking to an SEO redirector, which is a common phishing tactic. The primary external URI, https://gimoguvi.ru/wix?keyword=chat+codes+discord, is likely the destination for this lure. While no scripts were explicitly extracted, the PDF structure and the nature of the redirector suggest an attempt to trick the user into visiting a malicious site, potentially for credential harvesting or further malware delivery.

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
  • 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://gimoguvi.ru/wix?keyword=chat+codes+discord PDF link annotation
    • http://wepijafiguwenan.mywebcommunity.org/online_editor_delete_pages.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_6021a71a8dd75.pdfIn PDF document text
    • http://marketitaly.info/difupitugegejapiburepafypa21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_6028b309d2c9f.pdfIn PDF document text
    • http://raifaisentapp.online/difuditslt.pdfIn PDF document text
    • http://kismykeitio.best/what_does_charter_ref_code_s0900_meanr11l2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_6050fb972ef9b.pdfIn PDF document text
    • http://livecopyrightverification.com/nick_jonas_net_worth_in_croresd4kd1.pdfIn PDF document text
    • http://carbags.site/hp_designjet_500_priceg02ww.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_600f7d4024675.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/35842872775.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/2020_tax_calendar_philippines.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/figugipopar/classified_balance_sheet_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/printf_date_format_bash.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/ledorix.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/statistical_functions_in_excel_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/finokofakutezopulob.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/93716220364.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/mr_coffee_burr_mill_grinder_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 4700 bytes
SHA-256: 762d0167f3d11b77978a9cdac3f7aa4fd4a70c3787619668845f166f84a9beee
font_01_sfnt_off00010199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10199 10620 bytes
SHA-256: c67b6ce2972a3d171eec2f55f2e19e4deeb2ef88e940030ef46e3b58bc826bf5
font_02_sfnt_off00012606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12606 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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