Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d04fa7f0a4bbc1c…

MALICIOUS

PDF

74.2 KB Created: 2021-03-17 16:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a3be0b28038e1d4ad29577bb21f2f74a SHA-1: 70176101c4221aa743cbee4ab2bbf14524e7ceaa SHA-256: 1d04fa7f0a4bbc1c081c06276f47a73d6535185e298756c1ae992767ae90eab4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=endless+night+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475854/normal_6031dccec16de.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/inocydia_ios_8.3_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_60005c4529e60.pdfIn PDF document text
    • http://gosugas.getenjoyment.net/pijezafojodo.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/precipitation_theory_of_calculus_formation.pdfIn PDF document text
    • https://cdn.sqhk.co/wexapitode/BUgilR8/9999223717.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/HgigQgj/93350667081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_603afb9418d42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_6040796c0fcf4.pdfIn PDF document text
    • https://cdn.sqhk.co/kegimovotol/ehejaba/benaxuzeli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389793/normal_603f98f19bb52.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/czgghex/doom_movie_2020.pdfIn PDF document text
    • http://gipilunafa.iblogger.org/happy_birthday_mom_pics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_5fd8fc9796c57.pdfIn PDF document text
    • http://mebosopevux.iblogger.org/chinese_language_learning_software_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tajokuni.rf.gd/81656247635.pdfIn PDF document text
    • http://kibuwigukakew.epizy.com/batman_arkham_city_hienzo.pdfIn PDF document text
    • http://fomideveli.epizy.com/keluzurabanux.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_off0000e527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE527 4952 bytes
SHA-256: 45342d1d3a664c82ab38fa50efdb202014569636502ce0cedbd6b7653dc30aa6
font_01_sfnt_off0000f606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF606 12192 bytes
SHA-256: cb627c577d659fda13ac9c280f51ed54a71ca3188bede67191941a949496bf6d

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