Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43699ccab50c644…

MALICIOUS

PDF

81.5 KB Created: 2021-04-17 18:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ef23626b8d9307324422ec847872b2c1 SHA-1: e6a1cccaa908078a91b76b86f9f57566eae250f5 SHA-256: c43699ccab50c64441c710e3da95a1beccf25b4c738470708910e6934bfe7f06
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=skyrim+list+of+books PDF link annotation
    • http://resezowuzotul.22web.org/bukibosowalefaloxeko.pdfIn PDF document text
    • http://rijogemas.iblogger.org/38562347229.pdfIn PDF document text
    • https://mavosawiki.weebly.com/uploads/1/3/1/1/131163846/8448129.pdfIn PDF document text
    • https://fifubinagate.weebly.com/uploads/1/3/4/8/134854053/moxazu.pdfIn PDF document text
    • https://toviladul.weebly.com/uploads/1/3/0/7/130776498/015d031a768.pdfIn PDF document text
    • http://livunopewopo.iblogger.org/lic_jeevan_amar_brochure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruxusanufip.rf.gd/77174192160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d913d79d-80d3-4138-b4ea-a09b18e061e4/is_qi_gong_enough_exercise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e34ad74-9b86-47c7-bf58-70968158548d/28639970519.pdfIn PDF document text
    • http://libejejizu.epizy.com/interview_questions_and_answers_on_sql_database.pdfIn PDF document text
    • http://sagalesokalu.epizy.com/shutterstock_design_free.pdfIn PDF document text
    • http://nuxejoxulagub.rf.gd/cited_page_format.pdfIn PDF document text
    • http://kesazubajumat.rf.gd/3466985483.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/zosibukowepefekutavuf.pdfIn PDF document text
    • http://viladitotaxuf.epizy.com/somivevatipas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd58a4a-b9ea-444d-897e-2017ba251d5f/34001234388.pdfIn PDF document text
    • http://fiwazabon.rf.gd/at_what_age_does_the_male_brain_stop_growing.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/literary_theory_a_very_short_introduction_jonathan_culler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7e38ae-053b-417a-a433-b4a5fb4dad2b/which_branch_of_engineering_is_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ae98da-e8cd-4b9a-b741-3e78916a91c7/7469850542.pdfIn PDF document text
    • http://patuwovoparivi.rf.gd/thanking_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/how_to_setup_linksys_extender_re3000w.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_off000102c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C9 5112 bytes
SHA-256: 9408c62b8be00df32bbf871ec42190f56fb727835cca80fab741d8b00a4266b3
font_01_sfnt_off00011428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11428 10884 bytes
SHA-256: 3e87c94b17eccc29d74f96d28f5c42b4d507a21a741db94ae14b6099b5aff49d

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