Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d24a489900f26e7…

MALICIOUS

PDF

127.1 KB Created: 2021-03-28 01:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fa4d9814aa3b9efdc6cec22839d7486e SHA-1: 5bab393f2cf773e8fa30326f937d6fa6ab646d9e SHA-256: 4d24a489900f26e7ce54f008b5854650aa6b796abb4cb10b448c68e7c84401e4
126 Risk Score

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 0.9775

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://xezojetit.ru/strik?utm_term=how+to+program+my+at%2526t+remote PDF link annotation
    • http://shlifovka-pol.website/tasco_48t_telescope_manualeh3ci.pdfIn PDF document text
    • http://brightshopbg.xyz/pigepiganenejavipe2q8to.pdfIn PDF document text
    • https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/6818045.pdfIn PDF document text
    • http://irisca.online/ross_carbonite_2me_switcher_manualot5hq.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/doMjfid/wisulijebijudopuvoke.pdfIn PDF document text
    • https://cdn.sqhk.co/xinefegepe/ipifyGs/rirebamos.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/gajuledinowesikefosu.pdfIn PDF document text
    • http://artemk.ru/gapopusuzarajir00460.pdfIn PDF document text
    • http://manthoughtswebsite.website/parrot_mki9200_updatemiiut.pdfIn PDF document text
    • https://wonumizesux.weebly.com/uploads/1/3/4/6/134631676/6223423.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/bekin.pdfIn PDF document text
    • https://dufofumiwiz.weebly.com/uploads/1/3/5/3/135309849/fbd3401b.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/91idAie/walozi.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/how_to_write_critical_thinking_skills_in_resume.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/dFgehfD/hornblower_san_francisco_wedding_reviews.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/rirafuvjq47c.pdfIn PDF document text
    • http://lobafor.mypressonline.com/probability_mass_function_cdf.pdfIn PDF document text
    • http://formulamoney.top/52494596775t3bga.pdfIn PDF document text
    • http://dominis.xyz/tiwobesixofi0fecf.pdfIn PDF document text
    • https://bonawoxe.weebly.com/uploads/1/3/3/9/133986387/9305607.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/7bbf306.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/sjiihFS/tuguvulatalepodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bogeguva/hp_stream_11_pro_g4_ee_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/46126223898.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/rivesixetasapoki.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/flukey_luke_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/under_our_skin_movie_trailer.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18565 3388 bytes
SHA-256: d3a8eacc5d11e34a4146f39b9a0041f16743a3bd1007f1e1a617edea0a015bb1
font_01_sfnt_off0001919e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1919E 4600 bytes
SHA-256: 447dd5331af142500b9481b763130fb2c4151468cc87c6eabdb138f4e38a3f48
font_02_sfnt_off0001a147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A147 11844 bytes
SHA-256: dbf34bfc41da2904b0f75631a5ced4cdeef92130c7e349ae3b76c7d4709ee36f
font_03_sfnt_off0001c8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8E4 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_04_sfnt_off0001dd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD7C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176