Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b111c7f26d320ef…

MALICIOUS

PDF

76.0 KB Created: 2021-03-29 14:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f163c5d53931010dba82f484bb518623 SHA-1: e40b06a42671f5989f98eb2ac898c4591e0b9fcf SHA-256: 7b111c7f26d320ef0eac40f887a19066c0785cce47ee1eb2e4d3160db0079200
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it is part of a link farm designed to direct users to potentially harmful websites. The document body, though partially corrupted, contains keywords related to anxiety disorders, likely serving as a lure to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/award?keyword=trastornos+de+ansiedad+en+ni%25C3%25B1os+y+adolescentes+pdf
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/tiwadideti_litovazugutin_pikepevolede_lalut.pdf
    • http://ketosimple.online/27789838554q9liz.pdf
    • http://excschool.ru/causas_y_consecuencias_de_las_reformas_borbonicas0t6ci.pdf
    • https://sifoginugiji.weebly.com/uploads/1/3/4/5/134588619/7290517.pdf
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/4165238.pdf
    • https://baminivosawu.weebly.com/uploads/1/3/4/7/134701136/sowakixupukeju.pdf
    • http://help-feedback-amzn6.xyz/bernina_embroidery_software_crackxxdza.pdf
    • https://sinupumu.weebly.com/uploads/1/3/4/8/134893056/d530112b8d.pdf
    • https://lukazerud.weebly.com/uploads/1/3/4/3/134343231/kemepozamajobux.pdf
    • http://vitofemegawe.getenjoyment.net/pan_card_application_form_download.pdf
    • http://inostrana.com/elf_x86_stack_buffer_overflow_basic_1l0kab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_041e8c8c6e7c4605b58430ad824ca42a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b73c0325-7980-40e1-96ea-fc4a75150b35/data_science_bootcamp_online_free.pdf
    • http://vakifavu.onlinewebshop.net/lipid_absorption.pdf
    • https://uploads.strikinglycdn.com/files/f7302122-cf54-4cf1-8fae-a446272661fb/56028325598.pdf
    • http://xanedemu.onlinewebshop.net/27645783078.pdf
    • http://fazovalekotevo.onlinewebshop.net/luwigabowasedakawep.pdf
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_debf0c6f10c94e68822bbbcca2a4d4c2.pdf?index=true
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_cb3362415a1d4a8bbd6c49561330e5bf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8ec3da68-e6a5-412a-9832-239965407a99/68145822633.pdf
    • https://9c33b4df-6f14-41ad-9e94-a3a23f7ed20d.filesusr.com/ugd/2a975f_f07223fb694e4e7ba0d749ca6ae495f7.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90b.bin
70a14c401673b1aa53d680d8ec3a9b3c8b3de92903cab11931c1da2590e4dc54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 5412 bytes
font_01_sfnt_off0000fb42.bin
9ab6ada95e9a84813c36b7ced458a81cfddd1b4fc4f847a55201e304f291f441		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB42 11300 bytes

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