Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e7b32b652be503…

MALICIOUS

PDF

74.7 KB Created: 2021-03-23 03:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bf5e6f90d6ed960cb4ed106c6e155575 SHA-1: b846b39f8e7e338335a3aa0b3a9a710cc119455a SHA-256: e7e7b32b652be503890357553ae4432bd1f0e2b6e57953c015415acdfe8de2f6
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 0.9948

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://maypoin.ru/123?utm_term=landscape+background+images+hd+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492281/normal_5ff7ca716b5a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475203/normal_602f9af221103.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/rhgiJhh/73985245044.pdfIn PDF document text
    • http://car-den.ru/were_ancient_roman_buildings_painteds5pua.pdfIn PDF document text
    • http://optamorem.com/eyelash_extensions_aftercare_guide00dc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420432/normal_600836639a6c0.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/madifopipajexa.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/zhbifhc/marble_temple_quest_game_free_download.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/brother_p-touch_h100lb_beschriftungsgert_180_dpi_etikettendrucker_pt-h100lb.pdfIn PDF document text
    • http://efarbok.xyz/93540772150kdhmr.pdfIn PDF document text
    • http://formblckr1.xyz/techniques_in_organic_chemistry_4th_editionx2djg.pdfIn PDF document text
    • http://discovljzg.fun/75538866635m37o7.pdfIn PDF document text
    • http://fc-aromat.ru/14730472602bnwm4.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/fhgTCje/rush_racing_2_gem_hack.pdfIn PDF document text
    • http://shop-profildoors.ru/android_adb_driver_mac_ostf5qp.pdfIn PDF document text
    • http://duwuzoruperiged.scienceontheweb.net/are_ohio_death_certificates_public_record.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/casio_g-shock_mudman_g-9300-1dr.pdfIn PDF document text
    • http://medtechnika1.ru/helly_hansen_life_jacket_size_guidegcs80.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/gi8hahb/dilewozapimobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_602467cccc02c.pdfIn PDF document text
    • http://mebets.xyz/fununelajvyr4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449783/normal_605918319c180.pdfIn PDF document text
    • http://fafekaju.22web.org/zivovifesiril.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vefibuvusesusu.rf.gd/english_dictionary_book.pdfIn PDF document text
    • http://tununik.epizy.com/lekifasujeguguzuwubab.pdfIn PDF document text
    • http://dekifovep.epizy.com/carbatec_10_table_saw_manual.pdfIn PDF document text
    • http://netobuturove.rf.gd/how_to_become_a_fascial_stretch_therapist.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00B 5684 bytes
SHA-256: 67e4b877a0eb2db9e5541920d76390674f3727aff429af15d0e0934a4dbe6e98
font_01_sfnt_off0000e33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33C 10572 bytes
SHA-256: eadbc198e3b9bf5afff3d0270447282f0be246a26672ff72d6ab824a5ec91af5
font_02_sfnt_off00010737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10737 16164 bytes
SHA-256: d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44