Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b58c1a49dfc203…

MALICIOUS

PDF

77.7 KB Created: 2021-05-18 16:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c8094827db09c95eef56fe4579c2004e SHA-1: d38be931471fb7124b54b23b727e1ac9ee070a92 SHA-256: 14b58c1a49dfc20328b12b4fac23258cdb2c927eaf20065da75fab4c77d14dda
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. The presence of embedded links and the overall structure suggest an attempt to redirect users to malicious content, potentially a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=agar.io+macro+button+download+apk PDF link annotation
    • http://losiruwu.66ghz.com/44876675794.pdfIn PDF document text
    • http://siwelulatur.22web.org/navugunujelisu.pdfIn PDF document text
    • https://gefedotozowane.weebly.com/uploads/1/3/4/3/134395864/6500214.pdfIn PDF document text
    • https://gojamomer.weebly.com/uploads/1/3/2/8/132815882/bejolalix.pdfIn PDF document text
    • http://vijufik.iblogger.org/android_auto_not_working_f150.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/zujefit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76ac7b7-aac6-47ba-b66b-a6979a1c8129/nintendo_land_theme_park_florida.pdfIn PDF document text
    • http://dibulazovila.rf.gd/57462644400.pdfIn PDF document text
    • http://webixulibuka.rf.gd/is_gmat_really_tough.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/how_to_charge_smart_wristband_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c8f908-f598-4a99-9ff1-81fce1b184e5/33137302450.pdfIn PDF document text
    • http://rofosonovoze.rf.gd/69849596497.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/ponefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27af9cc4-49e3-4462-b8ca-afe6f6251c62/53210801233.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/answer_of_question_tell_me_about_yourself.pdfIn PDF document text
    • http://bidififi.rf.gd/67063702640.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/avneet_kaur_images.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/vidipixobe.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/chudi_jo_khanke_new_version_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/what_size_is_30_in_jeans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c843881-b1e7-4033-afc2-e994125dd2ff/can_you_cancel_sat_subject_test_scores.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/bajirao_mastani_full_movie_filmywap_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f25173cd-3eb6-4bf4-b9bc-190783a0d00d/hizbul_bahr_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/how_to_fix_boot_on_windows_10.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_off0000e8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B7 5532 bytes
SHA-256: bf35eb46f89811dfd76f808f389fe66da7b9c0ddb126f705731b12ed623761aa
font_01_sfnt_off0000fb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 14884 bytes
SHA-256: 468644ebd4803a6e4c2fb8aa9578023039467e597b6d452a093fa831fd36d30e

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