Malicious PDF — malware analysis report

Static analysis result for SHA-256 732c0692cf64ee6c…

MALICIOUS

PDF

78.6 KB Created: 2021-03-27 09:38:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05d048f041f7ca5ef1c0298ef29646a9 SHA-1: 88d2e5bb41903ff6997090301ca77f3ee71df47a SHA-256: 732c0692cf64ee6c2b33f85546c4c7b7da16fba301466203ff3b30460840b7f2
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, many of which point to link farms on disposable hosting, suggesting an attempt to direct users to malicious websites. The document's structure and embedded links align with phishing or scamming tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://cdn-cms.f-static.net/uploads/4387232/normal_5fdc59a2394a8.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_60446856aa866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480187/normal_60315fa3bcf30.pdfIn PDF document text
    • http://kobopez.mygamesonline.org/91000133046.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/el_amor_en_tiempos_del_clera_ingles.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/bilingual_dictionary_english_french.pdfIn PDF document text
    • http://zozeviremi.iblogger.org/wulojutom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_6038ebed66ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_601ebc42dfdbd.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/texas_defensive_driving_final_exam_answers.pdfIn PDF document text
    • https://xajibur.ru/wb?keyword=louise%20hay%20morning%20meditation%20PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b83e8668-a59c-485a-b1cb-f4351e786c26/safety_razor_without_shaving_cream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228795a1-7034-4316-b295-2adbd8d84d05/wufezo.pdfIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_618f1d5c2567409bbfe41f434000b22f.pdf?index=trueIn PDF document text
    • http://wobanunep.myartsonline.com/61884270295.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/introduction_about_myself_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/55034321454.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_3945f933107e42508d0975f6936a26ef.pdf?index=trueIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_5540c601fb224e9e975747de5f95c0ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b3fc52-affe-4015-918c-08275289e2a6/fiweduxorewofafojigose.pdfIn PDF document text
    • http://fosekor.epizy.com/pegoxagusatilinile.pdfIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_a559952da37f4f4c9313bedff415bf8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/best_android_apps_for_productivity_2018.pdfIn PDF document text
    • https://74df6fe0-557b-4e47-8461-f2df536053d0.filesusr.com/ugd/4dcf4e_1c964cc7b1564276a74732c34ba7595d.pdf?index=trueIn PDF document text
    • http://mebapuperepomuv.rf.gd/39731519480.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/covenantal_apologetics.pdfIn PDF document text
    • http://xixovunutev.epizy.com/adda_telugu_movie_songs_naa.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_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 5600 bytes
SHA-256: d2eb9ad5e73206bd70637c11cd1d3ae7fbb39f5e87abfe45d38d07178b3eb488
font_01_sfnt_off0001064e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064E 10728 bytes
SHA-256: ed87909630d9f7d5409bbf73d2f3e86284940f4c49d70550614616c6644e8509