Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a9dcf542e20abc…

MALICIOUS

PDF

70.1 KB Created: 2021-04-17 23:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eaf85ddfec5cc5e7802f7e280a54d486 SHA-1: 197fc97b37e9f7ac8d3559727ad7ecba12fd984d SHA-256: 37a9dcf542e20abc21da1a4004571a6ef4a644a33526517d86444c7141d28dd6
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 0.9991

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 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://maypoin.ru/strik?utm_term=moto+g6+phone+case+otterbox PDF link annotation
    • http://labebatazavanoz.mygamesonline.org/butazobejexilapenupajivap.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/which_electric_skillet_is_best.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/what_are_the_requirements_to_join_navy_seals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454040/normal_606ce0494927d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_605428d5c4b01.pdfIn PDF document text
    • http://dadevizevarek.scienceontheweb.net/vuluwuwitarinobojojik.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/nawegawopubezopoz.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/fractal_fx8_mark_ii_review.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/muxapenovevero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/60576341146.pdfIn PDF document text
    • https://e1c07d4e-6587-4767-b76f-5dea9cf3e327.filesusr.com/ugd/51a829_202cd57bd5284cbca63b9b706dfd7187.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/95834221634.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/online_to_dwg_converter.pdfIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_dc1f9c6043504113be0d83ecdfc40e96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sejakopa/16734215980.pdfIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_beb1c754380e4ad0973197a3f6cf7128.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwosil/79900067695.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/instagram_dark_mode_off_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/2nd_grade_math_subtraction_with_regrouping_worksheets.pdfIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/12763258025.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/bobagowi.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/93416569073.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/game_badminton_league_mod_apk_2019.pdfIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_eac2988d18ae4ba7a0752fe9db98d400.pdf?index=trueIn PDF document text
    • http://neloralo.myartsonline.com/formulae_and_tables_for_actuarial_exams_2nd_edition.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_off0000d349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD349 5532 bytes
SHA-256: f13573c498f7b53ab7b5be267b5ec2b4bc039ff7b69dedc5f82f2360b777949d
font_01_sfnt_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 10684 bytes
SHA-256: 2a15866f397ec08b48ccdbe74e6b7440ac7c6e47fb712fc17e79bc56b1543191

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