Malicious PDF — malware analysis report

Static analysis result for SHA-256 044be12083403ed4…

MALICIOUS

PDF

92.4 KB Created: 2021-03-15 11:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e37d0d87c8bc522ea951a1ed46fb68ff SHA-1: 8a97d8f65971a62d09aa1fd95a5116438fe06f29 SHA-256: 044be12083403ed46dc5cd87c719c4ab889c13cfc16481584666b2ecde974a56
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://botokaw.ru/strik?utm_term=husqvarna+viking+sewing+machine+ratings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473041/normal_602e78dd8902d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_602d3604047f4.pdfIn PDF document text
    • http://fbdirect.site/sennheiser_ew100_g2_microphone1vf7l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_601eb32b45802.pdfIn PDF document text
    • http://kreativoblako.com/79901469724z03t7.pdfIn PDF document text
    • https://cdn.sqhk.co/podidiwi/nhdAsR3/free_music_videos_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376606/normal_5ff123a2f1f0b.pdfIn PDF document text
    • http://tudewulowas.iblogger.org/wild_animal_worksheets_for_kindergarten.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/eaOAniJ/food_safety_officer_kerala_psc_notes.pdfIn PDF document text
    • http://rufawefojag.sportsontheweb.net/how_to_draw_a_dragon_eye_video.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidevepip/75jakhg/13557540683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_600f97248dc29.pdfIn PDF document text
    • https://cdn.sqhk.co/losomilodip/Tiaihgg/color_by_number_free_printables_disney.pdfIn PDF document text
    • http://legendbilisim.com/kejaduwovidilewobeuyb1c.pdfIn PDF document text
    • http://datulosuwila.iblogger.org/depigufojun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://binasizula.rf.gd/transcendental_meditation_mantras_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/camp_rock_2_album_zip.pdfIn PDF document text
    • http://xufolat.atwebpages.com/xavijereburojurozafim.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/aura_sync_rgb.pdfIn PDF document text
    • http://zivexotafoni.myartsonline.com/58345533306.pdfIn PDF document text
    • http://kixozixid.rf.gd/tifixikixetaja.pdfIn PDF document text
    • http://bevevekafoli.epizy.com/potesogod.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_off00012b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8B 5484 bytes
SHA-256: fe29cabad16fd3c6396e8f84b50afefbc176e0d67615a64d72e56a0a6dbedec9
font_01_sfnt_off00013e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E21 11132 bytes
SHA-256: 759b301b0d3b1661a5e9650e1bf94065e2007dd76777ea251d26338e198a7524

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