Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e5c2368d6ca74e…

MALICIOUS

PDF

73.6 KB Created: 2021-03-08 07:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 577b1d8d5f302755b0b0f3c888a87bbb SHA-1: 7eecb1bbf08faf4ae08a923c36ba07c65fd24390 SHA-256: e1e5c2368d6ca74e6fe65e10e70c99a4ccea316a2a0d3db2a50951eb4d7f0585
192 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The presence of a visual download button lure and numerous links to disposable hosting further supports a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and malicious links indicate an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/strik?utm_term=hem+ankle+rehab+free+pdf+download In PDF document text
    • http://liketsven.xyz/cas_298-07-7_sdsa6mil.pdfIn PDF document text
    • http://ketadiets.site/how_to_work_out_net_profit_after_taxegife.pdfIn PDF document text
    • http://detonic-deutschland.website/a_simple_favor_film_musichri2g.pdfIn PDF document text
    • http://bobr.space/toefl_writing_samples_agree_or_disago2c3m.pdfIn PDF document text
    • http://wonder-ita.space/my_favorite_dog_is_buried_in_the_yard_lyricslenhw.pdfIn PDF document text
    • http://airbin.top/10681832411mcnwc.pdfIn PDF document text
    • http://keepxufi.space/harry_potter_prequel_tv_seriesmdw7j.pdfIn PDF document text
    • http://pumba.fun/linux_server_administration_interview_questions_and_answers11w5h.pdfIn PDF document text
    • http://leoidet.xyz/zidekiwazabapanukorakofx8035.pdfIn PDF document text
    • http://lifeshop.pro/2764227085685bza.pdfIn PDF document text
    • http://acupofjacob.com/glitch_cam_mod_apktocbr.pdfIn PDF document text
    • http://a1metromovers.com/15893765213d7y3m.pdfIn PDF document text
    • http://detonic-italia.website/30194402300zi1jv.pdfIn PDF document text
    • http://bluebadgeform.com/screen_recorder_capture_audio_recorder_for_windows_102qvra.pdfIn PDF document text
    • http://2220202.ru/pitbull_dog_collars_australia0jc3f.pdfIn PDF document text
    • http://buylettersonline.com/best_free_movies_sites_2018xj1ri.pdfIn PDF document text
    • http://about-fb-support.com/xurunokok5fmq.pdfIn PDF document text
    • http://fartook.online/86511931488aqs5f.pdfIn PDF document text
    • http://baffer-shop.space/54302633223zl09f.pdfIn PDF document text
    • http://weinmvc.net/saxon_math_placement_test_answer_keysqbej.pdfIn PDF document text
    • http://govnososal.xyz/ear_infection_in_dogs_causing_paralysis9pisl.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/0c30e0b8-f416-42d4-84ca-d4ef1dc9b748/basic_data_structure_programs_in_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7f2295-cc11-40f9-b0c9-66f8148499c7/83259081384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6de98e-8f49-48d2-bd5c-bd27e8f8abf0/promo_heat_press_not_heating_up.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_off0000e31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31A 5360 bytes
SHA-256: 35c6178f9cf6d0b01c8c2c0c1250649d442a523a11d298a501d778c35621a764
font_01_sfnt_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 10500 bytes
SHA-256: 1e8aeccb1163f85587d82cf4a3ac20920a6106d9a41cfb803fa5ade0e5d9ad95