Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6dc80a016f7e9e8…

MALICIOUS

PDF

80.8 KB Created: 2021-01-30 20:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 64d67b2b8e2be38292d2437f086e4479 SHA-1: 04b694ee0212635a3fb2171062fae7cf764d524e SHA-256: d6dc80a016f7e9e8fe43e8e7b5585080d0839ee4a6c94b4318904a2de8ca08a7
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/wb?keyword=affirmation%20cards%20for%20kids In PDF document text
    • https://cdn-cms.f-static.net/uploads/4472198/normal_60155497c0707.pdfIn PDF document text
    • https://cdn.sqhk.co/kixepijap/ESid6he/tiktok_followers_booster_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_601549cccdd40.pdfIn PDF document text
    • http://guvinesusavilo.iblogger.org/android_tv_box_malaysia_lelong.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/sajazul.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/3CFgiBb/tepubudipatib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5fd6eae952770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420907/normal_5fd6545491cce.pdfIn PDF document text
    • http://wutukuk.22web.org/pazaxogirozipadufapifil.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/OGXiggf/amazon_music_family_plan_vs_spotify_family_plan.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/1404271.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502268/normal_5ff6921571942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401703/normal_5fe221d81857e.pdfIn PDF document text
    • http://popibiku.22web.org/gozukutufijetigigaletituw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rigirulame.epizy.com/scientific_calculator_for_java.pdfIn PDF document text
    • http://susugafof.epizy.com/format_essay_spm_report.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 6812 bytes
SHA-256: a34b840e6e726380c84f4f3a148208c6ea30fbf11d32fd72c0113864af826204
font_01_sfnt_off0000fedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDF 5188 bytes
SHA-256: e3057a9f24f45e44e58cc8446e7af357714444cf95086d796fdb808b7031ed2f
font_02_sfnt_off00011073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11073 10968 bytes
SHA-256: 3ebbfd6c4ffe8846991461cb414f1391930461c4ed05f511c5f8d232b4c89a06

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