Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bdb89ac46db5c6…

MALICIOUS

PDF

82.1 KB Created: 2021-04-05 23:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bccab1e38e666a51437f87326e4ca6a7 SHA-1: 085c9432ea4e7542d005075e6856d3e42dd4cabe SHA-256: 83bdb89ac46db5c69c6a7ba0794b643237269be268ed35779e6837acfcea8f7b
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious sites. The primary malicious URL identified is 'https://seumenha.ru/wix?keyword=tipos+de+metodologias', which is likely used for phishing or to distribute further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=tipos+de+metodologias PDF link annotation
    • https://s3.amazonaws.com/fuwuzerijofa/walmart_hours_omaha_nebraska.pdfIn PDF document text
    • http://midunetojonawiw.mywebcommunity.org/vadixudezesasede.pdfIn PDF document text
    • https://cdn.sqhk.co/jibezilesu/XgdtSjm/pizupubu.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/839927273.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/90765669329.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/samsung_rf263beaesr_aa_door_shelf.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/how_much_did_it_cost_to_rebuild_europe_after_ww2.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/58109405868.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/64443400085.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/4023269644.pdfIn PDF document text
    • http://bimonetejatoleb.mygamesonline.org/bedford_reader_9th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/MGylxgc/love_quote_broken_heart.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/igcse_english_informal_letter_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c9472f0-fd1e-437b-87b9-092797b0e1ad/netgear_gs108pp_power_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7d1121-746c-4dc5-8fbe-6b48b63411bd/2549700300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117c7940-62ab-4ef4-a382-469f737800f1/94920951636.pdfIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_33d8c4b96a184af4a8b4b91fa98b54a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f691ccf-d360-4410-99e1-63af420ce38a/the_right_stuff_tom_wolfe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9ae476-3b8a-4642-b2fb-bae1028a527b/gowebudejagulewirezulu.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_e4599ba76c5844798ff17fd80c1ebd57.pdf?index=trueIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_c1172ef083064aaf858ab8dcf1f46e87.pdf?index=trueIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_5ac86044ac264291be9c0c7bfd3475d7.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEA 5132 bytes
SHA-256: 096363288d613f368b947ce54a9490ba810509784d8ba20743e714f73272d97c
font_01_sfnt_off0001004f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 10780 bytes
SHA-256: a12fe58936bf8c590120675f9501453714dc0e955cd437dfd954b8536d6375fa
font_02_sfnt_off000123c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C6 16368 bytes
SHA-256: 2c5f51a476b4274b6b900fbba81fc97c04b4f1697b1aac53cf696a9c53e0885f