Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0998c4c78c44cb…

MALICIOUS

PDF

76.0 KB Created: 2021-03-04 23:29:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d7513d2857ffa774da4cd8c46161477f SHA-1: 48540bb66cb01f6116b0f8fd33257a2463d43108 SHA-256: 0b0998c4c78c44cbab21b73cc849869fe0f89b3a1b029133027acc7ca7d5ab2d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary malicious URL identified as 'https://soxebez.ru/wix?keyword=sophomore+english+allusion+worksheet+answers'. This URL, combined with the heuristic 'PDF_SEO_LINK_FARM', suggests a tactic to generate traffic or distribute malicious content under the guise of search results. The ClamAV detection and ML classifier further confirm its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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=sophomore+english+allusion+worksheet+answers PDF link annotation
    • http://tuxesimufimiti.mypressonline.com/la_ciudad_y_los_perros_english_subtitles.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/b3f44a4f.pdfIn PDF document text
    • http://igafnd.org/board_games_to_play_with_friends_online_free46xce.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/how_many_points_do_you_need_to_pass_nys_driving_test.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/how_to_self_clean_wolf_electric_oven6yenu.pdfIn PDF document text
    • https://cdn.sqhk.co/nunemiziku/sjgjdii/golf_hitting_cage_diy.pdfIn PDF document text
    • http://buloshnaya.site/gefibomalae6to1.pdfIn PDF document text
    • http://skout.tech/defixakimosetosuromm29.pdfIn PDF document text
    • http://kamini33.ru/jusugetefexetafomirspk6p.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/2674817.pdfIn PDF document text
    • https://zozabamefopofa.weebly.com/uploads/1/3/4/2/134234868/tupebuzagujipi-vofojonugifok-tabovaserafe.pdfIn PDF document text
    • https://cdn.sqhk.co/puwetudul/jjfibij/vebelafakex.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/siaifNd/78913287794.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/Q9sifMZ/wordscapes_level_8212.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/Mvjcmie/lepixitubejoxara.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/pogolo/81724831808.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/97280971872.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/autograph_bengali_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/free_decision_making_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/kegunezenuj.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/85755281902.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/palm_tree_leaf_template_cut_out.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/sujuzajolepezewosujoku.pdfIn PDF document text
    • http://koradanizepagow.myartsonline.com/columbus_blue_jackets_hockey_news.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_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 5492 bytes
SHA-256: 8989d617109fb294858f3dbc7710e6bb735b5fb94591f7e104524e7c546886b1
font_01_sfnt_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 10468 bytes
SHA-256: 2c0c0985324197df36326babd585e78a1e3b87a08377fe51ed316d26fa4937a8

Open this report in the interactive analyzer, or submit your own file for analysis.