Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ca4f9a8190c1ca…

MALICIOUS

PDF

78.3 KB Created: 2021-02-18 05:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 731798776cad0658d4f9418c64d5bc84 SHA-1: 0f2d613bc88f0be869cb52e7b5ee1f227ce8a59d SHA-256: c3ca4f9a8190c1ca8779e84054543b76768978723c51fe2f3a81e18e5b98b1ec
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL suggesting a lure related to "Fisher price jumperoo age limit" and pointing to a suspicious domain. The presence of multiple disposable hosting links further supports a malicious intent, likely to redirect users to a phishing or malware distribution site.

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://baarspo.ru/strik?utm_term=fisher+price+jumperoo+age+limit PDF link annotation
    • https://nodizolubuta.weebly.com/uploads/1/3/5/2/135297944/nolumokode.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/2362761.pdfIn PDF document text
    • http://bigswinner.space/wuwifopirexatironelefexgwf.pdfIn PDF document text
    • http://ttttrrrr.space/8867283892kyj2x.pdfIn PDF document text
    • https://cdn.sqhk.co/rokabumake/dgdhjpK/wamavifiroxelazu.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/jaaGge4/34250560105.pdfIn PDF document text
    • http://vujabix.22web.org/6202331604.pdfIn PDF document text
    • http://fitokaps.xyz/tabagixewevisilizewukofojklup1.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/gcgcTji/8061838763.pdfIn PDF document text
    • http://udilische.club/fraction_multiplication_calculator_in_simplest_form3xgwx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kizuwopo.epizy.com/78860740821.pdfIn PDF document text
    • http://sebekonomopataf.rf.gd/how_to_fix_acer_preparing_automatic_repair.pdfIn PDF document text
    • http://jewobadal.epizy.com/the_founder_movie_mp4.pdfIn PDF document text
    • http://robefopatobut.epizy.com/ontology_engineering_in_semantic_web.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/bootstrap_4_form_snippet.pdfIn PDF document text
    • http://fopekexu.epizy.com/my_maths_homework_book_answers_2c.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/73571741676.pdfIn PDF document text
    • http://jilabof.epizy.com/48300990649.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_off0000f5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FC 5380 bytes
SHA-256: 8aa2454220f724943baa7ac52f2fb42a4c09c87bbb9487a10207d51f25c62c24
font_01_sfnt_off00010826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 10412 bytes
SHA-256: 1c2d1ca0959a66d30806155b337f3d2bf59eb784416a62aba222407c1e2188c7

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