Malicious PDF — malware analysis report

Static analysis result for SHA-256 b386c88acee893ee…

MALICIOUS

PDF

68.5 KB Created: 2021-03-01 14:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0026ff2e6a54821927673de5154f5cb3 SHA-1: 915352f556bf96ed79d23918da711ff79afc609c SHA-256: b386c88acee893eee4a1a53253aa03996f1f77acf371f21896f8cfa51db348a4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/award?keyword=snapper+28+hi+vac+belt+replacement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384160/normal_6028a9eb8a623.pdfIn PDF document text
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/vatuwobofitepakiga.pdfIn PDF document text
    • https://cdn.sqhk.co/dukapudubi/migCyie/60416310815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_5ff12f4eecdcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_6031e1f753c4f.pdfIn PDF document text
    • https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/2081650.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/tkhggcH/x_shot_guns_chaos.pdfIn PDF document text
    • https://rakafofolobe.weebly.com/uploads/1/3/4/6/134649319/kakinuduvataba.pdfIn PDF document text
    • https://niravewowinud.weebly.com/uploads/1/3/5/3/135343761/2234797.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/0gggigj/31673630725.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/hhii72G/75371638853.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/lusabifef/73788406785.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/bob_evans_menu_homestead_breakfast.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/51702617306.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/why_is_my_sky_router_flashing_orange.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/64088530849.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/83564242860.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/tazasudoninumiwa.pdfIn PDF document text
    • http://lagexetese.epizy.com/uc_browser_free_for_java.pdfIn PDF document text
    • http://rokabimokow.rf.gd/history_of_black_friday_slavery.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/devudutenavinulotoben.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_off0000d011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD011 5624 bytes
SHA-256: 965558838f437501ce0484d9acd958f951748c12cc2f48c68b1bd8438baa03e1
font_01_sfnt_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 9796 bytes
SHA-256: b1b2143d104468f9095ce0b9ba9aeea84f5d089d9f0cbb86e1335c596d73f0d6

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