Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadf358435e9646c…

MALICIOUS

PDF

83.1 KB Created: 2021-05-12 01:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f066f74b74009092b7d4fa95f69c795b SHA-1: dd82eebdb7d1b146fe973d4097f8af698cdb9264 SHA-256: dadf358435e9646c5cd0b63fad867ba8001483cb90a9bbda2387f7a64ad53b58
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://xezojetit.ru/strik?utm_term=iso+27001+beginners+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481166/normal_60312c8fa5f8c.pdfIn PDF document text
    • http://rugozuravonabib.22web.org/zanefibima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_606ace53bf858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474170/normal_5fd06433dd9f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_5fd36ac0d3e17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_6034f786d8d30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402948/normal_60358736d6526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418383/normal_604d3f7ba8a5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_6064f898cdb84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/zumijoluxat.pdfIn PDF document text
    • http://pikejegavovul.rf.gd/eerdmans_theological_dictionary_of_the_old_testament.pdfIn PDF document text
    • http://zigemevopowab.epizy.com/22797174633.pdfIn PDF document text
    • https://67dbe094-6b68-4a2c-870f-9bd980043d88.filesusr.com/ugd/cff74a_de5d050fc8cc49bbadc9ab52b8e89216.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jijari/french_a1_grammar_exercises.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_3e973fdae6e4435c9f09e726e3ccf0e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/damerirazib/45549842790.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/r_alphabet_wallpaper_hd.pdfIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_201b9d052c994783b354d129980795db.pdf?index=trueIn PDF document text
    • http://popuzavefigud.epizy.com/blur_imageview_android_github.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C5 5232 bytes
SHA-256: ab84cf0af3ed509cb91b83016759777c67482beedaaff17a3e5eda1914761b96
font_01_sfnt_off000119aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AA 10656 bytes
SHA-256: b842994175b9e3f0a9b80609f8ea147bb6897ae8662e876268f41cb17af00eed

Open this report in the interactive analyzer, or submit your own file for analysis.