Malicious PDF — malware analysis report

Static analysis result for SHA-256 057c42e76c9178f8…

MALICIOUS

PDF

71.5 KB Created: 2021-03-17 05:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: bd5750c81083c787ce79718cf262e941 SHA-1: 5eaeb6d8505b77d64e4ec5c5e956eb3212ce36e5 SHA-256: 057c42e76c9178f839a6095dcd4d88266e9d9e9a4816f4e9a86dbe7792f1ebe3
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to credential harvesting or malware download sites. No scripts were extracted, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=elliott+hulse+rational+fasting+challenge+pdf In PDF document text
    • http://rafupofamurawaf.mygamesonline.org/toyota_rear_seat_entertainment_system_manual.pdfIn PDF document text
    • http://summer-italy.fun/xbox_one_controller_play__charge_kity4afe.pdfIn PDF document text
    • http://neyroskakalka.site/jajexiraxadiwsaezy.pdfIn PDF document text
    • http://momentshop.website/rajasthan_3rd_grade_teacher_salary_after_probationfve2r.pdfIn PDF document text
    • http://digitalcalakk1.xyz/two_long_parallel_wires_carry_currents_of_20_a_and_5.0_a_in_opposite_directionsh4rzk.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/41603663661.pdfIn PDF document text
    • https://nivunosanogerog.weebly.com/uploads/1/3/4/5/134516177/24a49441a537.pdfIn PDF document text
    • http://xojosagefe.22web.org/program_to_find_simple_interest_and_compound_interest_in_java.pdfIn PDF document text
    • https://tusigidufamem.weebly.com/uploads/1/3/5/3/135350313/tilosolozigevitivij.pdfIn PDF document text
    • http://bejugofixo.22web.org/the_neverending_story_song_lyrics_jay_electronica.pdfIn PDF document text
    • https://gosabejeda.weebly.com/uploads/1/3/1/4/131453015/pulinobezok.pdfIn PDF document text
    • http://mekozeka.66ghz.com/41081223902.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamidomepimebop.rf.gd/tekap.pdfIn PDF document text
    • http://norenebe.rf.gd/86629289962.pdfIn PDF document text
    • http://kamisobota.epizy.com/blackmagic_atem_software_control_system_requirements.pdfIn PDF document text
    • http://sufixis.myartsonline.com/31503166081.pdfIn PDF document text
    • http://bituwevemexeku.rf.gd/xunowazitodotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4506c5d-4e5c-4c75-afd5-0b16a1d6bdc2/cat_in_the_hat_characters_fish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97141dfd-89a1-4505-96a9-e0791910377d/lights_out_with_david_spade_season_1_episode_2.pdfIn PDF document text
    • http://besidoxaz.rf.gd/5_things_to_ground_anxiety.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_off0000d797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD797 5376 bytes
SHA-256: e82ff6697c538fba7761c022fdd3822176067f3f26022a48bb11ce0ac341333e
font_01_sfnt_off0000e9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DC 11032 bytes
SHA-256: 05c5972e8f7fe863f9bc9fcb605a2d76de8d2d7ab7d63f2150c137df8c08aa4c

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