Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abc437231a14552…

MALICIOUS

PDF

121.3 KB Created: 2021-03-24 23:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 10bebfa70c22c93eafd43da1259dab7d SHA-1: 67a9846b179b55d4fef5c55093b6dbebf3c1d267 SHA-256: 6abc437231a14552c327570e3e08a2f532e36cf60ca23f3d217b8e612c53f3d0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm pointing to 'http://hookup668.site/mipupeuazzy.pdf'. This suggests the document's primary purpose is to redirect users to malicious sites. The presence of embedded URLs and a high ML classifier score further support its malicious nature, likely as a phishing lure or a downloader for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://kuzutuzo.ru/award?keyword=akihabara+station+map+pdf PDF link annotation
    • http://hookup668.site/mipupeuazzy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469126/normal_605552c39a1fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485001/normal_603e6736e287d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_605379e9b3978.pdfIn PDF document text
    • http://trikolor.site/android_17_wallpaper_hdatv1e.pdfIn PDF document text
    • http://dress-russia.ru/the_smith-corona_floating_shift_typewriter_repair_biblehot70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443578/normal_600e2fb1bae63.pdfIn PDF document text
    • http://ideal-it.fun/19535816920qon80.pdfIn PDF document text
    • http://infonewsuk.site/jonevufumomizobabv5jm.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/ef8dacea-063f-422a-b6f1-fa2ad41eac92/puronejetenewawejirovu.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/vlookup_in_google_sheets_from_another_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/bahubali_2_telugu_movie_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/endoproteza_stawu_kolanowego_rehabilitacja.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/androidhackapps._com_authentication_code_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bca96e6-e66a-4921-bd62-c8a6d0e43f1d/tetiti.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/40301246730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1899b31-e7b0-48b1-9652-7d623cdd9275/how_to_install_profusion_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/sabixoje.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_83146e3908f54033b8decff2f12b8733.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4196574c-d397-462e-a177-a75da444eb13/selanezilotivenofuvazak.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_df873cd87bf4461682d36d8052cecb55.pdf?index=trueIn PDF document text
    • https://b147a2f3-58af-4013-9def-597e86e94513.filesusr.com/ugd/47d6bb_7523dd22bf2e4b23bda46e8a0b567228.pdf?index=trueIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_f4a7c9844520410090e3d1ca9a6f4d08.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA68 45844 bytes
SHA-256: 08ba9bd12ecc941d52fe06353f37096b4c8a1888f491d5bd27af76f7735015fe
font_01_sfnt_off0001872c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1872C 5444 bytes
SHA-256: ed9f8890fbf2792a864617f4da5a49bb65661ce32487eded276833fe09e0c92c
font_02_sfnt_off0001997d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1997D 11424 bytes
SHA-256: 55f6d44754a0fd904a1732424ba4a388ff939cb412406505f547bba086287832
font_03_sfnt_off0001c032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C032 16128 bytes
SHA-256: d44d52ef66720e7299aa23375668eb807971917d9a72a2eac4a2c392e38f6666