Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b37925604bd8c02…

MALICIOUS

PDF

71.5 KB Created: 2021-02-26 13:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2dee4bb87f8203bc95ae6412dc1752f6 SHA-1: 85368010a562747ac9dd74fdef44eb58ed7fdf39 SHA-256: 3b37925604bd8c0238f7b896eb3df2553b59e979c04b19b2df1936320fb31323
196 Risk Score

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://gimoguvi.ru/award?keyword=literary+criticism+research+paper+example PDF link annotation
    • http://wivaserana.mywebcommunity.org/how_many_calories_in_pf_changs_kung_pao_shrimp.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/DtjfdMs/digestion_begins_in_the.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/pascals_triangle_worksheet.pdfIn PDF document text
    • https://wixozini.weebly.com/uploads/1/3/4/3/134383912/rokofupiwesopejamu.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/fuzib.pdfIn PDF document text
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/00e11ac5d3ae2c7.pdfIn PDF document text
    • https://mafivuvaga.weebly.com/uploads/1/3/5/3/135323118/wivuwoneduxu_kigarip_datexoxupa_wafagewudusi.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/3giCgej/zexubanatusodi.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/dFgflhd/slidey_block_puzzle_cats.pdfIn PDF document text
    • https://cdn.sqhk.co/vovawumusa/djhijWE/65349684139.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/gowogidurone_vumorigegovur_vuvebitegobeb_barutipez.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/fuvidokibet/71462007594.pdfIn PDF document text
    • http://nupusadulawux.epizy.com/17579624063.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/jafesunixedafu.pdfIn PDF document text
    • http://jukikusikodopom.epizy.com/48050428396.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/kemilus.pdfIn PDF document text
    • http://sedijinuv.epizy.com/ringtones_for_android_mobile_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/visiting_card_design_eps_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/fertility_calendar_app.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_off0000dd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD38 5284 bytes
SHA-256: 5fc3a5a94c5b5958995a138c86fb8d70138e90f3e2f8f0ca2890cd0ccf03ba23
font_01_sfnt_off0000ef11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 9768 bytes
SHA-256: 4a95af55508ccf1206bae90d7ed682f991f729d6e5240461eab1be344e05c0fc

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