Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e450e7ae22b9e4…

MALICIOUS

PDF

72.6 KB Created: 2021-03-09 03:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d3e084ec736aefc9286ac6f8ce6a1009 SHA-1: b03b40bca2a18bc4b7ba64a79e77c04ee8869333 SHA-256: 20e450e7ae22b9e4f5846ced811fb065c3dfe757f97459fa730a88450a37a1ad
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'piano sheet music'. The presence of external URIs indicates an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/123?utm_term=triggered+jhene+aiko+piano+sheet+music PDF link annotation
    • https://pizavanaxuvilu.weebly.com/uploads/1/3/5/3/135386491/xigopemedol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408197/normal_6033470d6ed4c.pdfIn PDF document text
    • http://befemoxujutebi.22web.org/backcountry_full_movie_dual_audio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_6033403dc45da.pdfIn PDF document text
    • http://buyfastedcircle.xyz/14658399686qbjxm.pdfIn PDF document text
    • https://dikejupovavobu.weebly.com/uploads/1/3/1/0/131069859/3390880.pdfIn PDF document text
    • https://lebuwaner.weebly.com/uploads/1/3/4/4/134478239/9598524.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/kogumogezokijof_boxolok_zivawuf_jiturolatof.pdfIn PDF document text
    • https://tojemevu.weebly.com/uploads/1/3/1/3/131384016/tivubuvosofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388282/normal_5fd9a2ca1ad47.pdfIn PDF document text
    • http://topdouche.xyz/88061712075owjd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373004/normal_5ff00feda48a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463266/normal_601f5d97a60d5.pdfIn PDF document text
    • http://gigogon.22web.org/glencoe_algebra_1_answers_chapter_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_603e17dbac364.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453906/normal_5fdd4127e000a.pdfIn PDF document text
    • http://uorott.com/the_power_of_autosuggestionvw6n5.pdfIn PDF document text
    • http://afracheat9.xyz/baby_george_rotisserie_grillijjlc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://medomapex.epizy.com/kuboluzudezutetevofediw.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/superman_man_of_steel_soundtrack.pdfIn PDF document text
    • http://jevitof.epizy.com/advanced_language_practice_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/pofodedojakapevadevig.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/what_dog_food_is_good_for_acid_reflux.pdfIn PDF document text
    • http://wekijedi.epizy.com/ms_excel_formulas_in_gujarati.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_off0000df11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 5544 bytes
SHA-256: 2496ad470e59e1973d2e80337a5a1ed6dc1b11b1fce2b9746dbe4f6a884aeafa
font_01_sfnt_off0000f1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CC 10356 bytes
SHA-256: a19ad0b188c5a91d93a1db1422c96c79d55a25ad5247d67a8671e45588149f98

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