Malicious PDF — malware analysis report

Static analysis result for SHA-256 4290f8a26a647ba8…

MALICIOUS

PDF

79.3 KB Created: 2021-02-18 12:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 40a612386621f5eba6323beb46dbf444 SHA-1: 2ba8295a8fd01f69d28f7ce35a89db4f225948f4 SHA-256: 4290f8a26a647ba870ce6e738f98dd8f9dbeba0785c14401fda1a36ead896af3
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 significant number of external links, many hosted on disposable domains, indicative of a link farm designed to redirect users to potentially malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly suggests malicious intent. The embedded URL 'https://maypoin.ru/wix?keyword=minecraft+1.0.4+apk' suggests a lure related to game downloads, likely a phishing or malware distribution attempt.

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://maypoin.ru/wix?keyword=minecraft+1.0.4+apk PDF link annotation
    • https://cdn.sqhk.co/pibutuvopedu/6hAR1wN/28080863086.pdfIn PDF document text
    • http://itayoga.space/the_chaser_full_movie_dual_audioli78g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504870/normal_6002efc8b264a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505699/normal_5ffa71d6b6a31.pdfIn PDF document text
    • https://cdn.sqhk.co/jedepazisu/fjanjb6/55205564409.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/Bjj7gfi/new_word_games_online_free_aarp.pdfIn PDF document text
    • http://nat-fru.space/17400054830tkprz.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/7jbhgjh/jojo_siwa_call_her.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/ggtjdgc/defender_iii_hack.pdfIn PDF document text
    • https://vutubazedo.weebly.com/uploads/1/3/2/7/132740780/jexafex.pdfIn PDF document text
    • http://boomua.site/fluke_435_power_quality_analyzer_data_sheet2lwqv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/dowuzadebivud.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/wisconsin_child_care_forms_and_publications.pdfIn PDF document text
    • http://dibesenowox.epizy.com/sojisone.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/diferena_de_tipicidade_formal_e_material.pdfIn PDF document text
    • http://bonuroxuw.rf.gd/dukakavumuxobefepakiw.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE974 5184 bytes
SHA-256: e2a7fcde5f5b188ec96d04218704816655c284a387c35c55ab1a028f9320fdba
font_01_sfnt_off0000fb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3B 6524 bytes
SHA-256: 50c2aa038c237838a45a89cd5070754901a41ea606e3fa1a6ab494cf6708f591
font_02_sfnt_off00010c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5E 10524 bytes
SHA-256: d51310b210625e9851c899692fd86ea8e6e1bcec95a0f1b40b02e0e44cea80a6

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