Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a53fddb62cd67b6…

MALICIOUS

PDF

85.6 KB Created: 2021-03-27 23:05:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bf795072d5921077ce5b5bac56f00d86 SHA-1: 58e9c35f8a546aa4016080ad3ed4d11ff02389d6 SHA-256: 6a53fddb62cd67b6eafe7fa5230eafac99fd5c9683a61291d98f8deebd9f11fc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9985

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/award?keyword=alif+laila+bangla+pdf PDF link annotation
    • https://tuvitewolejuxow.weebly.com/uploads/1/3/4/6/134615754/gemenironexobitobo.pdfIn PDF document text
    • http://papogemedafudak.22web.org/luxumoliwaruguzelotikera.pdfIn PDF document text
    • http://zogaduwipirow.iblogger.org/census_vs_survey.pdfIn PDF document text
    • https://pokumowudo.weebly.com/uploads/1/3/0/7/130740164/c107b953c4b.pdfIn PDF document text
    • https://zurukuwimuso.weebly.com/uploads/1/3/4/3/134325804/57502c.pdfIn PDF document text
    • https://totibevopomuv.weebly.com/uploads/1/3/0/8/130813722/960947.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473619/normal_5ffea117ca90d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470698/normal_60112123de2b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_60481d1d1a4cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_6058ef4d0d34a.pdfIn PDF document text
    • https://detubutil.weebly.com/uploads/1/3/5/3/135348338/befe7.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/pirub_rufotipi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/gedexim/cheat_engine_apk_remote_system.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/uc_browser_for_win_10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/karefinizovilup.pdfIn PDF document text
    • http://nodafawujanego.rf.gd/the_good_doctor_2018_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/ski_kicking_horse_snow_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/laconique_resume_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/2400050506.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/90304397822.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/cursive_writing_font_free.pdfIn PDF document text
    • http://pogapebod.rf.gd/teaching_5_paragraph_essay_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/6198524706.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6C 5064 bytes
SHA-256: ea980771ad5a35e00ca671ad77aa7072b3f560d13f292bb3d002ea84f059184b
font_01_sfnt_off0000ecba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBA 10992 bytes
SHA-256: 005c5ed29440e63a6741f199983e45680442fe149520ba288932a7a34a1fa2ab
font_02_sfnt_off0001101a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101A 10644 bytes
SHA-256: f4cc64fbaac6467f9240b8015a69c418f69a4097b4ab902fbf2508b630c1625c
font_03_sfnt_off000133d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D6 5168 bytes
SHA-256: 64dd227ce8aac79d2ac3491d9c4ec4c80ccf20da27b6ee02c2f094c922d2049b

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