Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f49b9f6ca23d87…

MALICIOUS

PDF

85.8 KB Created: 2020-10-29 06:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 66a920ce443fe9689c1a1f56bc0b88bd SHA-1: ef94644e7b0cf5784fb23ffc2847c8e8fa7d2bb7 SHA-256: 88f49b9f6ca23d876fb6b6ebcd723d6964c442d61a1b7768015b03a071743ab3
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, identified by heuristics as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This indicates an attempt to lure users to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=fate%252Funlimited+codes+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f968aabede4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f87247a2470a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f88420dcfd9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_5f9a1b73672da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_5f8e42e05a23c.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/1/0496/1085/0467/files/kexidunodutizizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0853/9802/files/14654525885.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/bazigulusaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/laxagugasoxunevixopabufiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0126/5566/files/16753424226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a665c1-2240-4c8a-835a-d39d7a181fdf/gerufewuzemozaxufumal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1229/1264/files/88846079618.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/character_study_of_moses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9329/8851/files/new_nurse_manager_orientation_checklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1595/3320/files/bethware_elementary_school_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/is_mary_had_a_little_lamb_a_christian_song.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEE 24372 bytes
SHA-256: 9704a367939180d1b4d3eea1a186dc93a076e2f932877071726f9ae1b91c9a1e
font_01_sfnt_off0000e7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A1 5116 bytes
SHA-256: 42c1087f60da49c3efc2fe2a1f4afac80653e85bca2960ea0abfb05b6dabd86f
font_02_sfnt_off0000f8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FF 13320 bytes
SHA-256: 58c647a6181a5a6d4cd1fba6b5228d29573caa5ddde3e4c9c2d36ce4f7efec0e
font_03_sfnt_off000122eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EB 22436 bytes
SHA-256: 26aac5bbee2b359823b8dbfff6490a81ddda7b8eff42ed694acede9d3384287b

Open this report in the interactive analyzer, or submit your own file for analysis.