Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fa976d3bd7cb0e…

MALICIOUS

PDF

73.8 KB Created: 2021-03-03 17:09:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d8a636da2afe4b1d0df6cccac6232370 SHA-1: 8f353d3b462ffdf83da05639cd7853322d7187bf SHA-256: e7fa976d3bd7cb0e1b6608ad1da00f1e1595ac88e48911e42d7fd4774a3e20c8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to distribute further malware or engage in phishing. No scripts were extracted, but the PDF structure itself is indicative of a malicious distribution mechanism.

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
  • 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.
  • 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://nipisod.ru/wix?keyword=divinity+original+sin+2+rogue+leveling+guide PDF link annotation
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/depedunewusezi.pdfIn PDF document text
    • https://nopufara.weebly.com/uploads/1/3/3/9/133999240/zukibuk-jusutobij-ramotejalorok.pdfIn PDF document text
    • https://pilidikuvitas.weebly.com/uploads/1/3/4/7/134766888/8eb866c8bd6.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/ceXxajd/kexufimetigetobome.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/hgjhggh/sizofusujigenasax.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/bjhvfgc/global_citizen_festival_2018_stampede.pdfIn PDF document text
    • https://cdn.sqhk.co/rowavarop/SdIhihb/mexapipibaxijuvitikit.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/mensa_practice_test_iq_score.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483331/normal_60335fd5aa5bc.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/online_ms_word_document_editor_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486035/normal_6031ef73ec90a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475580/normal_602b7d0621031.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/the_happiness_equation_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/c9QOulW/abc_song_lyrics_rap.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/ghibjdO/1900578245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_60174515da197.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417413/normal_6004861f555c7.pdfIn PDF document text
    • https://wimopoxidiki.weebly.com/uploads/1/3/5/3/135313965/4663364.pdfIn PDF document text
    • https://cdn.sqhk.co/lakabarobuk/gTBhhb2/good_airplane_movies_on_netflix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 5284 bytes
SHA-256: 0916e45b4f8995388d12e10fae25c497e1ef13b61ed9bce0154e5dd6a87ed9a6
font_01_sfnt_off0000f670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF670 10288 bytes
SHA-256: 2645388eb74be4ae01040ce7d3cd820cd70643dbf1711839e880ac21c6102bc5

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