Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab16ebbf79109451…

MALICIOUS

PDF

66.9 KB Created: 2021-02-28 00:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b73650af3a70a75493e9742c649fa5f1 SHA-1: c362fa57eace025407c0e076e3bcf18a15c0f76c SHA-256: ab16ebbf791094514fe35b7467fa7a7704e3275f6bb328905c717960aef36d9b
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=hello+kitty+microwave+cost PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500678/normal_603511ad3fcc8.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/gadukanivapogunivojiju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385412/normal_5fe29226e5f1f.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/49917218778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_601e19ed4dfec.pdfIn PDF document text
    • https://lakupofudeb.weebly.com/uploads/1/3/0/7/130775354/gorebo-wenemovaselok-xuveteraz.pdfIn PDF document text
    • https://bodakipufasedoj.weebly.com/uploads/1/3/5/9/135972884/aa6366caab8.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/how_to_reset_a_odometer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_60307f55182b2.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/ximapomeduxedu.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/gixaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484115/normal_60308bed5687a.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/3037891.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/xefezesebusu/basara_2_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/voice_recorder_equalizer_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/my_family_in_spanish_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/murezeroxata.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/fonilizemipodaxok.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/airtel_live_tv_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/87293103628.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_off0000cbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDC 5224 bytes
SHA-256: 9d4fcf2d1426eea0270944df48b7eb01fd3057bc94129a000e411acda779edd3
font_01_sfnt_off0000dda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA3 9656 bytes
SHA-256: 1b0b781a485c24e09f60b6cc5c040dc3b81235f36d97bb0c49cf69d03d2458c3

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