Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d33000d8ac6491…

MALICIOUS

PDF

75.5 KB Created: 2021-03-28 00:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 312e9dd3aff8b3450f17585e20621c46 SHA-1: b325eafe07e06fb1c25d7c49722d46ecb45c0652 SHA-256: 69d33000d8ac64919c027aa5accf9d787de14ea729c70819062be162e3f39c21
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to disposable hosting and employing UTM parameters, indicative of a link farm or SEO spam campaign. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://pelibifir.ru/strik?utm_term=how+to+print+google+maps+directions+with+street+view PDF link annotation
    • http://vijevejumozugim.sportsontheweb.net/upsc_cds_exam_syllabus_download.pdfIn PDF document text
    • https://rawesare.weebly.com/uploads/1/3/3/9/133997405/7183431.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/hepatocellular_carcinoma_adalah.pdfIn PDF document text
    • https://xijukuto.weebly.com/uploads/1/3/4/3/134354051/4241408.pdfIn PDF document text
    • https://litoxixolemor.weebly.com/uploads/1/3/4/3/134379235/382101dd2c602.pdfIn PDF document text
    • http://gunojiv.22web.org/wiravudog.pdfIn PDF document text
    • https://fopojikanerev.weebly.com/uploads/1/3/4/8/134888820/e37da1de742b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b697fd0-c670-4312-8c66-855974222f89/58990525862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3e14a6-9aa5-4e48-9a09-c5c0cb52349f/fisher_price_snugabunny_swing_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f0870c-e14e-4c71-a60c-ac8a2c7af738/what_are_the_types_of_norms_in_psychological_testing.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/more_basic_chess_openings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc7b3b1c-4553-497b-898d-8e2ef58afd67/18516924974.pdfIn PDF document text
    • http://xodeboraduzex.epizy.com/making_customs_declarations.pdfIn PDF document text
    • http://rajiwewovipu.epizy.com/un_metro_cuadrado_cuantos_hectometros_cuadrados_tiene.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/55326066569.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/4608651353.pdfIn PDF document text
    • http://lamasebov.epizy.com/22047860695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d74ec60-936d-40c0-b56d-cfd089e11005/how_to_start_off_a_crochet_granny_square.pdfIn PDF document text
    • http://nolepukopele.epizy.com/xipolukofenibudu.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_off0000e8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DC 5600 bytes
SHA-256: f4da560d3e527f5ab26e8b1525c8d2bc4accebca6ad720d11ef36a044cf72386
font_01_sfnt_off0000fbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 10812 bytes
SHA-256: fa6ba4a51f3c97727211e145aed684bca950e15956769b30cbf76bfc0198c7a3

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