Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8025eb3637a1273…

MALICIOUS

PDF

78.3 KB Created: 2021-02-18 11:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 25381c81b051dcf7d8d34609d80a231d SHA-1: d0802c3c807eaf6605d24687e50590fb6e0e331c SHA-256: d8025eb3637a1273b4a6cc7f06f24127f89574c55e39956eb16dcc793aa71a50
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable or unknown domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the sample as a link farm on disposable hosting, and the ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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.
  • 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://jacksth.ru/strik?utm_term=pantone+formula+guide+uncoated+2019 PDF link annotation
    • http://roskycnmx.com/51981088368u7m6w.pdfIn PDF document text
    • https://cdn.sqhk.co/kagawupatow/9gdjdhi/29164821621.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451750/normal_5fc9936234d03.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/6ngcCgh/pokebuddy_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402533/normal_6001259bc015a.pdfIn PDF document text
    • http://copyrightshelpscenters.com/saucony_guide_iso_vs_iso_2qovis.pdfIn PDF document text
    • http://gikadoketu.iblogger.org/dismissal_form_template_south_africa.pdfIn PDF document text
    • http://registrat.space/tevanozonemnzamy.pdfIn PDF document text
    • http://look-hotel.com/jasper_jones_study_guide_questionsj7sfc.pdfIn PDF document text
    • https://cdn.sqhk.co/waxusuxagaki/jbTORie/rilibolawerigitepowo.pdfIn PDF document text
    • https://dezegumi.weebly.com/uploads/1/3/4/1/134108828/pavisugiro.pdfIn PDF document text
    • http://vukipika.iblogger.org/camera_fv_5_apk_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xagunege.epizy.com/rac_breakdown_cover_uk_policy_booklet.pdfIn PDF document text
    • http://tosaxope.rf.gd/51739737416.pdfIn PDF document text
    • http://dejoxatumiki.rf.gd/13311087088.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1A 5528 bytes
SHA-256: d2690629f9788566943f4399f856be9aded8e6661222bd40c132d4afba15f2f3
font_01_sfnt_off0000e1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CA 11224 bytes
SHA-256: 33da702cb538d25d3edb43b402d2684dc40834e1d0711fab264de9265a58cc3e
font_02_sfnt_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
font_03_sfnt_off00011d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D46 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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