Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9b4933a4da55a5…

MALICIOUS

PDF

67.3 KB Created: 2021-03-09 13:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 870756fcd36358e1507ba85c931fe03e SHA-1: 0878aa4b450362d16d6ecafaef554a16c49a5c6b SHA-256: eb9b4933a4da55a5da699502f7a7fad6682c9bd8ed39cd465c8dcfb592c6cc79
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs that point to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to a network of potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=pokemon+guide+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459185/normal_5feb930de1cdf.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/how_do_i_fix_blurry_epson_printer.pdfIn PDF document text
    • https://cdn.sqhk.co/zafazegig/ggjbjft/nintendo_64_emulator_mac_catalina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5ffa894c286f1.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/how_to_download_itunes_on_ipod_nano.pdfIn PDF document text
    • https://ritosigom.weebly.com/uploads/1/3/1/4/131453630/2949958.pdfIn PDF document text
    • https://bogezemobazuv.weebly.com/uploads/1/3/1/8/131856224/nerisafexido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_6037f15aa0bb7.pdfIn PDF document text
    • http://wefinexof.iblogger.org/odia_film_abhimanyu_full_movie.pdfIn PDF document text
    • https://rixeludabigadak.weebly.com/uploads/1/3/0/9/130969597/2789534.pdfIn PDF document text
    • http://dinewegivogofe.mygamesonline.org/71080860965.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/sopekisuf_pobutisagixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427284/normal_6031de7cc2528.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387056/normal_5fec77fbb6e39.pdfIn PDF document text
    • https://xekigumi.weebly.com/uploads/1/3/0/7/130776031/8919288.pdfIn PDF document text
    • https://cdn.sqhk.co/lekabadixi/8hiviZF/loop_of_henle_sodium_reabsorption.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/sebunuzu/dilot.pdfIn PDF document text
    • http://mudozegiviw.epizy.com/menovabojikopa.pdfIn PDF document text
    • http://nititagamoba.rf.gd/molekosapisi.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/26379401274.pdfIn PDF document text
    • http://bujekotu.atwebpages.com/vawavuvapajadewapinaf.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_off0000cb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3C 4832 bytes
SHA-256: faa3ffab8a321a2ae7e88474bd6836dbe248818e2bd9b52a7a0190f764dd2f84
font_01_sfnt_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 10824 bytes
SHA-256: 0dddcd6b601b3a92675c04c864c9bca5dd0a0d6cc00bdccd9add05ac2362e63b

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