Malicious PDF — malware analysis report

Static analysis result for SHA-256 deae343b0d585385…

MALICIOUS

PDF

73.5 KB Created: 2021-02-13 09:31:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4831dbe285bd2aaf99a82e4f71cec6c4 SHA-1: bf9afa1f2e55bd900be8a76ecb543d85f7ce7574 SHA-256: deae343b0d5853858264c4883a9cba3c1b5833b083a96f8c677dff2fc6bce69c
174 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including suspicious links and a link farm on disposable hosting. The presence of a 'download button' lure and the ML classifier's high confidence score further support this assessment. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to trick users into downloading further malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/wix?keyword=telecharger+live+sport+tv+pro+apk PDF link annotation
    • http://tegikelekosux.22web.org/maple_leaf_rag_piano_sheet_music_original.pdfIn PDF document text
    • http://loginwithfb.site/what_cars_have_android_auto_2016vnq38.pdfIn PDF document text
    • https://fiwarurebel.weebly.com/uploads/1/3/2/8/132814972/suxetobojavobezoza.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/9fRifij/bendy_juicy_simulation.pdfIn PDF document text
    • http://classicalnaturally.com/69072056326wqg9q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzegekizizovin.epizy.com/dovilosowidalodabaletimeg.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/celebration_hymnal_song_list.pdfIn PDF document text
    • http://xolekazejufu.rf.gd/89289721911.pdfIn PDF document text
    • http://goseletew.epizy.com/decompressive_hemicraniectomy_guidelines.pdfIn PDF document text
    • http://zugujegezamuto.epizy.com/vidyut_jamwal_movies.pdfIn PDF document text
    • http://buwumipulufi.epizy.com/18560812751.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/kundli_2012_software_with_crack_free.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC88 5268 bytes
SHA-256: bcf7657e76ce9ca1a798f2f9cd1fd835305519f71a5371bd627eb428625f4a1b
font_01_sfnt_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 10616 bytes
SHA-256: e2e1ec1158b25a40db2a6f72f83719bc4b916a140da280cf9e306089b12ca4dc
font_02_sfnt_off000102f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 16520 bytes
SHA-256: 3d37129a6eb3396f587985d89d56b8345dc043c148b7b0be2859575ff33b3264

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