Malicious PDF — malware analysis report

Static analysis result for SHA-256 6748107399dc4119…

MALICIOUS

PDF

86.1 KB Created: 2021-03-01 19:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5024835530dcd7eef273b8ff2ba85ac1 SHA-1: 20ed5eb313f15eefc73ef377e8beed3572ebc0ac SHA-256: 6748107399dc411945d71f731b8354d373fd5e6dd213616c6944fd34fd458d87
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains keywords related to 'Kindle modell' and 'generation', suggesting a lure to a fake product page or scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=kindle+modell+d01100+generation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494668/normal_6023490fe1003.pdfIn PDF document text
    • https://cdn.sqhk.co/tipadasa/hjWn2uG/new_ringtone_2020_download_mp3_mobcup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503524/normal_5fe4fb4a7b9a0.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/88636066029.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5febb7a54fd42.pdfIn PDF document text
    • http://smartcreditscore.info/6677166306d6za4.pdfIn PDF document text
    • http://stalekost.site/what_was_mesopotamia_called_in_ancient_timesd9m0f.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/jizvhgv/textra_sms_pro_4._11.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/sample_safety_data_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5fd158556c52e.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/jejbje5/fujorubukuderosuzelibito.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375194/normal_5feb0a8cac9a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424010/normal_5fc86fafef9a0.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/mukutud/quotas_for_navy_advancement.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/human_cell_structure_and_function.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 5

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_off0000ffcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCF 5132 bytes
SHA-256: a0ebc88e8517f4437864982bcef91d4f65db422ee009ebcdb693c3af37cfcdd6
font_01_sfnt_off0001112b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112B 7224 bytes
SHA-256: 1d19a5f2022e800f4cd7f3c00adb103713741f32fa084a39eb3ee4693a4a27c2
font_02_sfnt_off00012380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12380 11004 bytes
SHA-256: 2f543b78a4bec0182cb45db407926dd76972de01fbcd4fa03aad89a42887b871

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