Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e62a9c56299008…

MALICIOUS

PDF

57.4 KB Created: 2020-11-04 15:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fb64f1c3dcc4d324fecfcf28d4b41940 SHA-1: dbc93fbe84121a574c7e585be9e43a86ca6af3ce SHA-256: d2e62a9c562990088e8d8e16e5beb60c8a10d561ee903c7b762c9d8d1df3c5de
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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.
  • 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://cctraff.ru/aws?keyword=venice+italy+buildings+on+water In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/61246215009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/4350/5329/files/dujivilogazijopaga.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/44737219509.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/grand_am_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/acharya_narendra_dev.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/39185769738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2688/8862/files/56_60_tractor.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/princess_luna_human_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/momesa.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/watch_top_gear_online_watch_series.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/63246690757.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b02d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB02D 23600 bytes
SHA-256: 054a7f7db2a0872fbf58cb246d931c2ded70e62c7cf196aec83c567aad60e2e0
font_00_sfnt_off00007749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 5408 bytes
SHA-256: d792cbd3a11633d1b55b5957c0e9cca08ec45ea8757dea32826e718fc0f419b3
font_01_sfnt_off000089d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D2 11588 bytes
SHA-256: be54fbb7a8010585e839e32848de8e654ab0eae60fc993146be974c3154d2443

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