Malicious PDF — malware analysis report

Static analysis result for SHA-256 7285a900e99e1b4d…

MALICIOUS

PDF

80.6 KB Created: 2021-03-23 03:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 416f27f2d16bd2f971ea3ce97299a484 SHA-1: 1945a421c3bcc22baaeeda84265b370d9c0e8a3a SHA-256: 7285a900e99e1b4dadd2f56c6b2809b3fd2b153fd2f29b9dbcca8aadf901ebde
156 Risk Score

Malware Insights

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

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 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/123?utm_term=new+york+state+mandated+reporter+online+training PDF link annotation
    • https://rudixesawemes.weebly.com/uploads/1/3/1/1/131163949/99b60ef46.pdfIn PDF document text
    • http://jelojutu.sportsontheweb.net/deficiencia_de_carnitina_palmitoil_transferasa.pdfIn PDF document text
    • https://mosugomepa.weebly.com/uploads/1/3/4/0/134096926/berewulogulodo.pdfIn PDF document text
    • https://lewozokor.weebly.com/uploads/1/3/5/4/135400983/nisebozekugoma.pdfIn PDF document text
    • https://xoniwolujejusun.weebly.com/uploads/1/3/4/4/134456196/7e027a12427d89d.pdfIn PDF document text
    • https://puruvafapazono.weebly.com/uploads/1/3/0/8/130815059/narusari_defijebos.pdfIn PDF document text
    • https://bunosepe.weebly.com/uploads/1/3/1/3/131379858/nejokopaxut.pdfIn PDF document text
    • https://dubilovatigalis.weebly.com/uploads/1/3/4/7/134701517/kowutip-kotuwaxo.pdfIn PDF document text
    • https://dawudetunik.weebly.com/uploads/1/3/5/9/135972975/45c93fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vidugozu.atwebpages.com/adding_and_subtracting_fractions_word_problems_with_unlike_denominators_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/85790843022.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/96693409495.pdfIn PDF document text
    • http://lurolubudoruk.onlinewebshop.net/wibizisezisotonuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/24187799293.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/employee_handbook_template_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/befowegekun.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/gijuresukulivamitiviko.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 5504 bytes
SHA-256: 9210d66fba942a303f494a5c6c8eedb5e227daf60854e8de4407113b46b7035c
font_01_sfnt_off0000f8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FF 11328 bytes
SHA-256: 7a4a7da3da4ec71130d5adfed3ee6971b84df9f55f051138285f3509fffb23b4
font_02_sfnt_off00011fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d

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