Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a920d5ce08d344a…

MALICIOUS

PDF

141.8 KB Created: 2021-01-27 13:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a362d7804e2ea984a079bf95c5d1c0dc SHA-1: eb935d802750d8e09d9ecf184e2ea87fdae4109c SHA-256: 0a920d5ce08d344aadf69c2eee52b1dc3d07db4a12c935a857c3c527836446b4
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, and one specifically to a known malicious redirector. This suggests a phishing or SEO poisoning campaign designed to drive traffic to malicious sites. While no scripts were extracted, the PDF structure and embedded links strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9754

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://cctraff.ru/wb?keyword=dream%20score%20soccer%20champion%20apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4465142/normal_5ffc65c69b73e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465396/normal_5ffe48c0412dd.pdfIn PDF document text
    • https://wabobileminila.weebly.com/uploads/1/3/5/4/135400898/89b414af06b39.pdfIn PDF document text
    • http://invitesistem.ru/5833766321pg3qt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5fd7bae8b94ff.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/icidmif/kawisezagowotojefetuwofuv.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/kifejolesodoj.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/jiLP2jj/badibugokidiwax.pdfIn PDF document text
    • https://cdn.sqhk.co/junulevi/062iaiA/castaway_cove_condo_ocean_city_md.pdfIn PDF document text
    • https://sidedelozamuk.weebly.com/uploads/1/3/1/4/131482822/masevir.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/xawemijapub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408174/normal_5fc82f541b381.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/cSyijlO/tenenorilotomunevi.pdfIn PDF document text
    • http://kupivse.xyz/nazusonalasizovokomakoj17vry.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/ehciehf/drift_clash_hack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lemujiv.epizy.com/wejonudubu.pdfIn PDF document text
    • http://wawutanow.epizy.com/femagubejedobinotoximi.pdfIn PDF document text
    • http://tinipolevuzow.epizy.com/59986391740.pdfIn PDF document text
    • http://xobofob.rf.gd/nonipalopuvawobigularowu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001914e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1914E 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off0001a113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A113 3212 bytes
SHA-256: 2b26561a534be988507905d73bfbb378643d61b5c427114ab3d3e73e741c459d
font_02_sfnt_off0001ac7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC7D 5204 bytes
SHA-256: 52de53c271110a2f2423338ba8699ee4960b4d47c3717b597e4266051f62b70a
font_03_sfnt_off0001be04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE04 12944 bytes
SHA-256: 3aeccc4219310382e56a595f74bf22f61bf79b7be1b1b7cd6731f6db410fcd15
font_04_sfnt_off0001df9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF9F 12968 bytes
SHA-256: f034473dd36f8c460d0732a952f41b936c2e0fbe1e7b698ed94f3df8adbfcdfd
font_05_sfnt_off000209d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x209D9 16444 bytes
SHA-256: 9b1c2793f4378111ecae95a2bf0f3ab77d2831d5d7393ff742f254240916d3bc
font_06_sfnt_off00022004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22004 1760 bytes
SHA-256: 8576fcf8417d6fe7cd56199e17b13e6e7b329a727bc53aa70e50c1890997257a

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