Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1f930a1005111f…

MALICIOUS

PDF

84.3 KB Created: 2021-05-06 12:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 306f8261350e590530776f934ce2c172 SHA-1: b957319e80e1b88c54115db0684de45a2bdca892 SHA-256: 8e1f930a1005111f75180b8c3114a6a63607be3645be359f1693d860fb96512a
156 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one primary URL pointing to a phishing lure for a "Keto cookbook online free". The presence of numerous external links suggests an attempt to manipulate search engine rankings or distribute content from various sources. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://nipisod.ru/strik?utm_term=keto+cookbook+online+free
    • http://sikutamilom.iblogger.org/vekil.pdf
    • http://juwolopuga.66ghz.com/jovutozumazowakegikupom.pdf
    • http://majelogajizivo.iblogger.org/rudovabowobesivesobar.pdf
    • http://rigewojugofalas.iblogger.org/2015_amc_10a_solutions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_a7747cf3ea55458fb5b0c70c72918590.pdf?index=true
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_0064a0ed8104465c8e9a74371ff8795e.pdf?index=true
    • https://40c507a3-37b7-491f-afd3-f28ba3af1fb2.filesusr.com/ugd/7f5264_7abb68119d884fee8a7c71a212dd07a7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/81ec8c49-de08-48ec-9459-dee9fd59e033/4498257437.pdf
    • https://f8206d31-21c4-4aef-9da9-e4259ded718a.filesusr.com/ugd/c2bdac_b623545af05545af908b59f7fa71f3aa.pdf?index=true
    • http://dejosabo.epizy.com/vegemareduriwozoxutuk.pdf
    • https://uploads.strikinglycdn.com/files/f117d173-a575-4ed4-914c-d8f4347f6543/jaxomegesinudis.pdf
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_24743d0695cf49d891cf14cd99c21e04.pdf?index=true
    • https://f8b57e9d-e272-4783-b6f5-6420e6b93425.filesusr.com/ugd/886b73_81ef47ce11034bb1b0e0063b75ef8599.pdf?index=true
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_bf7c389b0daf461d8d93d21e7c2a9a1d.pdf?index=true
    • http://wuwejujadabatej.rf.gd/possessive_adjective_exercise.pdf
    • http://jazoxuxorilule.epizy.com/tuxijupowakasumejuw.pdf
    • https://uploads.strikinglycdn.com/files/b9e26cae-9008-43f5-bfb6-41f05f28393e/lidujipanogiwanuzafupako.pdf
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_31b18947c419443ca9abe40fd3d5dc1b.pdf?index=true
    • http://robipurovunox.rf.gd/51294570102.pdf
    • https://uploads.strikinglycdn.com/files/4aa5ef6c-3eac-45f2-97b0-a4c51cffdf39/gevidunusupuwu.pdf
    • https://uploads.strikinglycdn.com/files/41fb0cc7-46b4-43f1-a679-e7fdbd4ba6e7/libro_filosofa_del_derecho_eduardo_garca_mynez_gratis.pdf
    • https://uploads.strikinglycdn.com/files/85d09b28-1fca-4e6a-9121-627b8eebb499/what_to_plant_on_west_side_of_house.pdf
    • https://uploads.strikinglycdn.com/files/d00e9ad8-ea07-40fe-80d0-4b9e3e62fae1/ruzebidetubugidomi.pdf
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_9f56a3cf70ff4fe89ad79665e3fe2c4c.pdf?index=true
    • http://vagawujososoje.epizy.com/comment_installer_une_camra_ip_de_surveillance.pdf
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_34d7da3ca65a49aebec7b303bbf24f1b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffec.bin
6a55e1dc81e4e9bada60be8073e9c276782747898b31ad7ec623da197ce2f8e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEC 4448 bytes
font_01_sfnt_off00010f10.bin
8781d1d81fd9c1156ea869816d2480ee57fe8bed97c07d80e4531d15c656b9ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F10 11096 bytes
font_02_sfnt_off00013401.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13401 4324 bytes

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