Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd51e3349b3e9ba9…

MALICIOUS

PDF

37.7 KB Created: 2020-10-02 01:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ebebf754f80cc4ca6008b3802c910c7b SHA-1: 610ead22d8d207d44172b370006af7c9624057ea SHA-256: bd51e3349b3e9ba95ec4f7721198063af206047fc9f06984644652fd7758f6df
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=jennifer+everett+obituary In PDF document text
    • http://gifite.adairgunsmithingllc.com/uploads/1/3/0/9/130969858/jixuzekuwixusofob.pdfIn PDF document text
    • http://files.yourservantforever.com/uploads/1/3/1/8/131857383/wuganajurowidetofuli.pdfIn PDF document text
    • http://files.missingthings.org/uploads/1/3/0/7/130775276/e04c32299.pdfIn PDF document text
    • http://salituz.incolorartgallery.com/uploads/1/3/2/6/132682076/6dfb2bbf.pdfIn PDF document text
    • http://files.stemgage.com/uploads/1/3/1/3/131380177/kusegap-febisixejok-sizejabunanus-debapesizox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6622/0956/files/the_beatles_cartoon_intro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0488/9758/files/44660264235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/0219/3062/files/85380084091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd7004c-cd4e-4371-b0b8-46fa8b452081/20270814156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f600adc-c046-4dfb-a280-c2bf2bc734f8/9564716465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cdcc03d-3701-4e18-85d2-bb3b34c8a67f/togewokowana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb98e4b-ffb0-453f-ac20-b3624c71c46d/rofobusunamubugutidura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e004241-aa5e-4dca-a163-eec1003fdb71/fadizab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3534/9151/files/65681709710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7058/4987/files/wojogitafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0039/2612/files/wonenoma.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_off0000566e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x566E 4844 bytes
SHA-256: def77e5bacaad8b045fe7d41ebd249ab8cd69e0fcbd5142f1b43b8f305e77caa
font_01_sfnt_off0000670f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670F 10240 bytes
SHA-256: dd7c7fb8c0b48ddc1b6db2a3a5d54299fa9ec2bf47a4002f50cd5dd1d2be84e9

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