Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcc2c382b44bc7d…

MALICIOUS

PDF

91.5 KB Created: 2021-04-02 01:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7aa3d058d1f693d85afd7a9b5f1e0822 SHA-1: 051d8f107052f00dd49f1d28fe7b60253388536b SHA-256: 9bcc2c382b44bc7d2cc1e87f079ee58c80a5fa942fee8db76b82190227cc57bb
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to suspicious domains and are likely part of a link farm designed to host malicious content or redirect users to phishing sites. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a malicious intent to direct users to external resources. No scripts were extracted, but the PDF structure and embedded links suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://soxebez.ru/strik?utm_term=adding+transmission+fluid+2007+chevy+impala PDF link annotation
    • http://lenusabipowezo.getenjoyment.net/20836182525.pdfIn PDF document text
    • https://somokowu.weebly.com/uploads/1/3/1/3/131383604/e39e39cf.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/protein_synthesis.pdfIn PDF document text
    • https://lozusometuzasop.weebly.com/uploads/1/3/4/7/134741376/6004030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501794/normal_6023d1fddc184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_6025a29c105ee.pdfIn PDF document text
    • http://walawatomu.mywebcommunity.org/chacha_chaudhary_stories_in_english.pdfIn PDF document text
    • https://zagodifibom.weebly.com/uploads/1/3/0/7/130775293/5974738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473359/normal_602ea0f49f039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_602c9e2c184b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459636/normal_5fc70d71c4eb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/fairy_tales_with_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/bluetooth_suite_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/45700926908.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/23156599945.pdfIn PDF document text
    • http://bupalim.atwebpages.com/50992494965.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/goguzil.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/carbon_footprint_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/ordinal_numbers_exercises_for_adults.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/panasonic_kx-tes824_pbx_software_installation.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/air_supply_hits.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_off00012579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12579 6076 bytes
SHA-256: 552676cd6083728db45e371d6dd349bdece1efe914981cd031c19d4e5593a84a
font_01_sfnt_off00013a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A12 11348 bytes
SHA-256: 3ac3fef55b7e5d6b0b71852f2ac4eee8d3352836ac982e306df5086ac91edd07

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