Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a0102bfeff4aee…

MALICIOUS

PDF

84.2 KB Created: 2021-03-10 21:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 09927d7029828a49249e21492453ccc9 SHA-1: 2fbaa49980d0c7921ae7f4556d7df6106e9bb952 SHA-256: b0a0102bfeff4aee2586743dfbff00707308d306fc4567364d709ea2f976b39a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=ppe+checklist+form+template PDF link annotation
    • https://patosalar.weebly.com/uploads/1/3/1/3/131384166/389094.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/Vt75his/72924104825.pdfIn PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/a31fd0d73.pdfIn PDF document text
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/4471548.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/juvesijawuzeziwat.pdfIn PDF document text
    • http://static-get.top/ejemplo_de_antologia86ero.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/sgcijja/the_sims_freeplay_hack_apk_android.pdfIn PDF document text
    • http://pornbustyvids.com/zusolesixanedoxememajetury4jk5.pdfIn PDF document text
    • http://pubgmobiie.com/syberia_2_walkthrough9kqr2.pdfIn PDF document text
    • https://cdn.sqhk.co/webunojixisa/aT73mjq/91642394045.pdfIn PDF document text
    • https://zusiwujewanu.weebly.com/uploads/1/3/6/0/136054437/5981445.pdfIn PDF document text
    • https://cdn.sqhk.co/ninulekuto/ibiinRE/bounce_back_loan_explained.pdfIn PDF document text
    • http://physcoo.com/rakejederubinejivuvalutxmag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_82e30007fb0d4f65806fd416f9e33fdc.pdf?index=trueIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_78e5c063be8e4bc3a374bcfcc11ee74d.pdf?index=trueIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_95e563eee2f74f31a561d3ca5dc1511b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49670de9-0f85-40f9-9a74-85db43a83cf4/how_to_program_rca_remote_to_rca_dvd_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2175485a-56c2-4b30-a01e-a16c93881612/39823281815.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_2b37ef33a1144739a668cf82c13e0a03.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/988a2e59-7300-4a62-97fa-dd42edea0863/what_is_the_best_amazon_fba_course_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ba3cbc-150c-4394-b5ff-0cfa8f30a3ed/white_rage_free.pdfIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_6d88cc26a19e4c5bb138a8f1727a8cff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4685920-f9f2-4733-aefd-20fddb333bc6/dr_sebi_mucus_free_diet_download.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_off00010cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCA 5320 bytes
SHA-256: d9677711d1a118ac5168e7abaf4ce826b8a1b0de4ac457a7a892d6c7d101d2d0
font_01_sfnt_off00011eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB5 10640 bytes
SHA-256: 5704cf7a4ce9fcbf01e49ec2069f749a4d35dcfe8430802615967c2295989b77