Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6e5f79636f553a…

MALICIOUS

PDF

81.6 KB Created: 2021-04-08 23:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dc846dedfb774e17f2d23872bc39d7c0 SHA-1: 4047da8391893caf2439df56c91d0e88ea17386e SHA-256: ba6e5f79636f553ab06d20b6c3b2cbf93fd7c6e9bd052a6a5b6167a66d0f3950
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 0.9993

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://midufefew.ru/strik?utm_term=what+size+tires+are+on+a+2012+ford+focus PDF link annotation
    • https://cdn.sqhk.co/boketumejipa/jjajfXS/about_us_template_html.pdfIn PDF document text
    • http://kizidotiz.iblogger.org/alliance_aircon_remote_manual.pdfIn PDF document text
    • http://peskomment.ru/how_to_play_riptide_on_ukulele_tabs4li2a.pdfIn PDF document text
    • http://zootime.store/fluke_networks_intellitone_pro_200_review2zb38.pdfIn PDF document text
    • http://iranomics.com/733012892403fogs.pdfIn PDF document text
    • http://juxeribitu.iblogger.org/temotosafetoral.pdfIn PDF document text
    • http://all-system7.work/arnold_toynbee_kitaplarkku3q.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/Agghdjc/youtube_vr_videos_download.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/3pihKje/pixel_cup_soccer_16_apk_full_version.pdfIn PDF document text
    • http://ouily.xyz/how_to_calculate_h_in_manometer0dhtu.pdfIn PDF document text
    • http://nupubidodeje.22web.org/71086852512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_3d2640b1cd9948e091d9830dc42bd40d.pdf?index=trueIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_3f0c9340de394cedbe4658a40f10fa6d.pdf?index=trueIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_a85f2f0511934ec6ae63e28a2560774f.pdf?index=trueIn PDF document text
    • http://wimanusor.epizy.com/oxford_dictionary_all_words_with_meaning.pdfIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_eca6d471eba74515aece64413bf19a49.pdf?index=trueIn PDF document text
    • http://gazugitub.epizy.com/tilepebeja.pdfIn PDF document text
    • http://bizivedigudo.epizy.com/do_i_need_to_watch_jack_reacher_movies_in_order.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_73a6b5eb3fc34e78bc15594af48a27e5.pdf?index=trueIn PDF document text
    • http://gesuzutegusovid.epizy.com/74827033709.pdfIn PDF document text
    • http://disobaratid.rf.gd/33748347646.pdfIn PDF document text
    • http://texelodefa.rf.gd/bible_commentary_free_download.pdfIn PDF document text
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_243995097b3843079613d1f283101a10.pdf?index=trueIn PDF document text
    • http://gafibis.epizy.com/applied_economics_notes.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_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 5464 bytes
SHA-256: 46d189f95a8c7fb2bfd2134e3da846623dacecb8fc2cf904b09ced8afad3905b
font_01_sfnt_off00011312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 11044 bytes
SHA-256: ae4c72d01124317ce1e66091997e3fc5fdd7711dd6486a21553ade1c69bf500a

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