Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c09efa20ffbfd30…

MALICIOUS

PDF

79.6 KB Created: 2021-03-07 17:36:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2ca77914bf094ab8ac06cfcb3c3e8b95 SHA-1: fa8e631db7fa55d66ba3d5706ffb170a2ffacb63 SHA-256: 2c09efa20ffbfd3031b831ae127013402036556878157bd55d760fb0619fdc97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to external websites, indicative of a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of external URIs and a PDF link farm heuristic points towards an attempt to drive traffic to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://soxebez.ru/wix?keyword=christmas+crossword+pdf PDF link annotation
    • https://xemilesexevig.weebly.com/uploads/1/3/4/2/134266110/nabadewatevaju-maforosan-jizudefifop.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/hihekAW/farming_simulator_16_fertilizer.pdfIn PDF document text
    • https://cdn.sqhk.co/fedijadika/hjDhjR2/12631673238.pdfIn PDF document text
    • https://cdn.sqhk.co/gaximeme/dMNLLml/never_have_i_ever_lee_rodriguez_age.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/dhihigc/sixajaruvetapi.pdfIn PDF document text
    • https://sugowula.weebly.com/uploads/1/3/4/6/134646485/fewogeboxag_berabamekul_wibokerara_rudujin.pdfIn PDF document text
    • https://vipelunova.weebly.com/uploads/1/3/2/7/132712034/b5b403d38.pdfIn PDF document text
    • https://cdn.sqhk.co/gobisofokox/iifjfih/ibps_lic_assistant_2019_admit_card.pdfIn PDF document text
    • https://cdn.sqhk.co/luzeginu/hhfg3es/commuter_bike_vs_road_bike.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/ActjdUG/gapozoji.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/aNOgiXR/heroes_war_counterattack_global_release.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/5NHhhib/who_won_the_cowboys_vikings_game_last_night.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c75bee-d880-489d-b614-ccd6d9380ba6/red_cross_lifeguard_certification_written_test.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/the_secret_language_of_birthdays_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/wabopinubet.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/nipupinafamed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf17f2ea-68eb-4f51-be06-427a6aa180ab/how_to_calculate_kva_for_transformer.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/39467054574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8e3a6e-3a04-4ca8-a9aa-a67dc8123bd3/jane_eyre_paintings_symbolism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5cf435-b751-4f4f-8b33-a0c6aa8c41e1/58334472551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7215c055-560a-4054-943f-708b1c83558a/which_is_best_wing_chun_or_taekwondo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532d1d72-7418-420d-9b06-fc122dbbc31d/72264607063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d928400-2877-479c-9b89-ad8a3dcc72f3/46426403709.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_off0000fb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB29 5360 bytes
SHA-256: a2a9d2c8cecdbb4bc5b85e13dff17f4db5de185aa5e1221da6f616aa6a2f95ed
font_01_sfnt_off00010d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D40 10476 bytes
SHA-256: b80728d51947664a80c60255f9d408afde71a3416026a4b3fc4c6c6cd5ee7f7e

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