Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe051b585996471…

MALICIOUS

PDF

158.4 KB Created: 2021-04-29 08:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eccde7101f82f616efe233a720f961e3 SHA-1: 851efd0a3804cb8ac94bbeb314bc65b3a7dfd75d SHA-256: bbe051b5859964712208a33d76383182b5b3e4f69c7d98410370bee3a0234888
126 Risk Score

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 0.9996

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://jottigo.ru/strik?utm_term=what+is+traditional+music+in+japan PDF link annotation
    • http://pirunumilusarib.sportsontheweb.net/learn_turkish_in_arabic_language.pdfIn PDF document text
    • http://wefigofozotime.22web.org/loi_binomiale_formule.pdfIn PDF document text
    • http://fitinejatesut.iblogger.org/fusionner_2_acrobat_reader.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_a2bb99d743f74125bdeeff1464e85d55.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3498317-bcdc-483d-946f-7c37e2ef994d/95663200778.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/musiluno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be85289-4c73-4f21-a726-205519400337/kovufivibofibutosujaku.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/rejavokitiseletumazu.pdfIn PDF document text
    • https://64e1471b-64f8-4582-b127-b1692805dd1b.filesusr.com/ugd/507a3d_73d64ca1871c464cb190efe0940eb939.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ad2f93-70d5-40df-9b7b-4adf98a10102/what_is_epictetus_philosophy.pdfIn PDF document text
    • https://a35b4eae-300a-44a5-b982-8d633984e519.filesusr.com/ugd/19735e_875e12e000184f0781db11d5fbd9fcf5.pdf?index=trueIn PDF document text
    • https://8e75e8be-0f37-480b-85ac-641553c1acf9.filesusr.com/ugd/a4a1ce_17600b183a834bf7bd749320cb272f61.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_887c8f7e540d404899f56012c1aa8325.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/attack_on_titan_season_3_episode_2_review.pdfIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_aaa1361fad3b470d9e451c82dab9f1b0.pdf?index=trueIn PDF document text
    • http://vabizawez.epizy.com/cute_doll_hd_images_free.pdfIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_1d59b86fe60643fdaacaf59946524a04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/mizujulexemolarametiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba32c26a-076e-482e-a81b-bed16b6a4010/what_does_the_symbols_on_an_oven_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/mercedes_benz_glc_250_performance.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F20 58468 bytes
SHA-256: 5dcd034734ff43f1557cb3b94195ecf108a4ab18b1877d223de0e08a8aed7e5b
font_01_sfnt_off0002305f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2305F 5404 bytes
SHA-256: 55203a955b797ca14de1d291a8e7c954443182249ae543c66dbc8a608fae7f22
font_02_sfnt_off000242a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x242A2 12552 bytes
SHA-256: 26c4c79462af09140c1785e46027e35d12b0feea9ee14e9aaf57a39c2f0a16f8