Malicious PDF — malware analysis report

Static analysis result for SHA-256 6548c46b5740cdef…

MALICIOUS

PDF

81.7 KB Created: 2021-03-01 01:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 80b7afc1ce332560e0377e16599c7502 SHA-1: 04a91f55459ade77911269e879d97ae2e9cae97d SHA-256: 6548c46b5740cdef337f9ad616b9603e530d5545571d0752583c3aeee79f1c23
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Poweramp apk trial reset', indicating a likely phishing or malware distribution attempt. The presence of external URIs and the overall structure strongly suggest this PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/wix?keyword=poweramp+apk+trial+reset PDF link annotation
    • https://cdn.sqhk.co/jirudumom/behjy7j/78226812650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_6031e098ddd4d.pdfIn PDF document text
    • http://auth02mobility.com/tusotugoxev62fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380692/normal_5fde8154471ac.pdfIn PDF document text
    • http://fruitslope.online/jodetibivuzeteraxev16m5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412583/normal_6000bc3734158.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/25819607636.pdfIn PDF document text
    • https://cdn.sqhk.co/vajirasavuz/zuwHhfM/best_2020_books_by_black_authors.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/when_is_the_new_twilight_book_midnight_sun_coming_out.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_602d00c976675.pdfIn PDF document text
    • http://piredvizhnik.com/aadhaar_card_printing_software_free3its2.pdfIn PDF document text
    • http://lnstagram-office.com/puvugigokaxujolefokef23f5n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5fd1799b75b71.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/gEihIgc/mhst_the_adventure_begins_apk.pdfIn PDF document text
    • http://i-men.ru/93985097068k4vft.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kaloruligot.onlinewebshop.net/tiduwodivezib.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 5124 bytes
SHA-256: 5ec0d62cffd1e0f5ef17a4c92a28ffa541cd483b72f33e47acebd8fe945d3c7a
font_01_sfnt_off0000f6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000ff54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 10472 bytes
SHA-256: 565e2018a6961157852a6446305c3abba1f6616cc1adf2db9b0a23b039a9039c
font_03_sfnt_off0001234d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234D 16376 bytes
SHA-256: f267a97a42ed964490c0c36cf8d24d30f5cfc386ee24850e75bb3a4991f11828

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