Malicious PDF — malware analysis report

Static analysis result for SHA-256 50864ff97bcb21b4…

MALICIOUS

PDF

70.9 KB Created: 2021-02-19 08:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a3940406e057a51c9f91dfe428af4f01 SHA-1: 1259d781106a009bda808ff69d57d8a4a4d2e503 SHA-256: 50864ff97bcb21b480bec9cf281bc2fe7c913931e049e5eaa5fcfc1574af03a6
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://jottigo.ru/wix?keyword=psx+emulator+apk+download+for+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5fe08e9e79e37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460723/normal_5fd77fa99f16f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_5fe87aa71e7a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_6015429a60f5e.pdfIn PDF document text
    • https://toromadon.weebly.com/uploads/1/3/4/5/134523466/3e09ca56f0.pdfIn PDF document text
    • http://doorstepcomputers.com/how_to_become_icf_certified_coach2ow2n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_601e64ee3852f.pdfIn PDF document text
    • http://verifybadgesbusiness.com/reaccin_de_combustion_completa_del_propanob113u.pdfIn PDF document text
    • https://zufodivovogopot.weebly.com/uploads/1/3/1/3/131383523/fuwinimaxusikemivipe.pdfIn PDF document text
    • http://accueilcmb.com/how_to_pair_dish_joey_remote_to_tvtwdql.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5ff63747659d8.pdfIn PDF document text
    • https://pimidunobesuxig.weebly.com/uploads/1/3/0/9/130970022/potolozira.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/firudegix/capitalism_lab_full.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/liftmaster_csl24vdc_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/garnet_hill_linen_sheets_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/website_movie_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/photoshop_digital_painting_brushes.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/agrifarm_utto_mp.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/technical_report_writing_examples.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_off0000d44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44D 5412 bytes
SHA-256: 5b81a48fba5a562bbf5e32be2effd862924bff3f1070174ebca007772c95cd3f
font_01_sfnt_off0000e6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 13212 bytes
SHA-256: c7bfa0fbd59cf0710806328eae3001e66fab2436b7ff154623a8095abd658b2e