Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d37d0bc277e1492…

MALICIOUS

PDF

94.2 KB Created: 2021-03-20 16:11:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 72f65494ba26d1835626c49bf404f5ef SHA-1: 8786bfb2119b1b20e94601ab65edec3dc68ed9aa SHA-256: 8d37d0bc277e1492e6cecec16f20caf8f6bd6bbb9f777cf5e3feee8bc3f4a6b3
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to what appears to be a link farm, suggesting a phishing or SEO manipulation scheme. The presence of external URIs and the ML classification strongly suggest it's designed to lead users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 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.
  • 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://leonvi.ru/wix?keyword=date+ariane+apk+ios PDF link annotation
    • http://tacfitproducts.com/java_tutorial_videos_freetp0h9.pdfIn PDF document text
    • http://thehensleys.org/how_to_start_a_second_line_in_excel_cells6vqk.pdfIn PDF document text
    • http://hydrofthol.space/guguwuriwolisupojazoxi07m.pdfIn PDF document text
    • http://skywonder.space/4857825520tpukf.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/97499684459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_6017b12c0e345.pdfIn PDF document text
    • http://tesocoin.online/does_2006_honda_civic_have_timing_belt_or_chain3lqky.pdfIn PDF document text
    • http://uscarinsurance.info/pharmaceutical_calculations_practice_problemsizzlq.pdfIn PDF document text
    • http://copyrighthelpptteam.com/coca_cola_hbc_annual_report_201730jf7.pdfIn PDF document text
    • http://liketsven.xyz/cod_recipes_baked_panko4tlap.pdfIn PDF document text
    • http://ru-payment.casa/xutirupum36dw.pdfIn PDF document text
    • http://bogipeborowe.sportsontheweb.net/esl_library_conditional_sentences_first_conditional_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_604c983435d7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377656/normal_5fc916d091c4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470402/normal_5ffca84507d88.pdfIn PDF document text
    • http://logekolumo.22web.org/84425539339.pdfIn PDF document text
    • http://myfoxing.online/fat_loss_diet_plan_for_female_guru_mannixd9m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minudumira.rf.gd/80507804908.pdfIn PDF document text
    • http://ruxatavebokoj.epizy.com/77472654794.pdfIn PDF document text
    • http://diratat.rf.gd/acordes_para_guitarra_de_mas_alla_del_sol.pdfIn PDF document text
    • http://luwatejanif.epizy.com/another_way_to_say_rise_and_fall.pdfIn PDF document text
    • http://neketepa.myartsonline.com/english_textbook_year_4.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/how_do_you_oil_a_grandfather_clock.pdfIn PDF document text
    • http://nupadamemal.epizy.com/xibow.pdfIn PDF document text
    • http://nijesetu.epizy.com/roxobun.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CB 10384 bytes
SHA-256: 0c82bbb221ea952db8a2562ffcf9722e44413d8bbe906a171cde6006e75cff2f
font_01_sfnt_off0001127b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127B 4844 bytes
SHA-256: 6109a78b136ada21130b222767649ce08f43d3c56ef5ac46dc1a33905c11c328
font_02_sfnt_off00012303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12303 4048 bytes
SHA-256: cdfb05372377039ee43e54e83d70e5c1a454d378d1b1c4d17cad8c61a4901ecf
font_03_sfnt_off00012e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E72 11728 bytes
SHA-256: dac87d8ba216c80e1ac830e587697dc6c318018450d9b14a3282978f03ab768a
font_04_sfnt_off000155e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155E4 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb