Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b0c9396ea12ca4…

MALICIOUS

PDF

76.4 KB Created: 2021-04-04 07:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 103207a26ed99331c16afd50cb60af03 SHA-1: ddab0d6593e4c4ff0d1ccf2807bc23ff141a1225 SHA-256: c9b0c9396ea12ca41a0d992c761d645b79b13c867a1d6ea0bd31c7e63bb7193f
96 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM', with one prominent URL pointing to a suspicious domain. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the structure and numerous external links suggest an attempt to redirect users to potentially malicious content or facilitate further compromise.

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://xezojetit.ru/strik?utm_term=talk+to+my+girlfriend+application PDF link annotation
    • http://texewofe.22web.org/routledge_encyclopedia_of_philosophy_edward_craig.pdfIn PDF document text
    • http://zipogagu.iblogger.org/34457497057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490735/normal_6043ed52917e8.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/fenelolenusexagib4ncd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383687/normal_5ff7e89e31161.pdfIn PDF document text
    • http://logvoz.ru/sony_wireless_bluetooth_headset_manual6pf4x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b73db3ac-2e3c-475a-83ab-7f4668f00a8f.filesusr.com/ugd/80e8fa_8fc4c2681b1b44ddbcefd86299d799bd.pdf?index=trueIn PDF document text
    • https://836291d8-7b77-40db-be8c-3105928c7ef3.filesusr.com/ugd/aae074_8df02d1f22654defa7227aa14b737601.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gopifu/guided_reading_level_and_grade_equivalent.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/ibn_kathir_books_in_urdu.pdfIn PDF document text
    • http://tazufixurudem.epizy.com/sentry_safe_instructions_dial_and_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/1967751479.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_c3f15c7b33984d02a8e0831287a02012.pdf?index=trueIn PDF document text
    • http://rilasiwawizumo.rf.gd/blood_type_b_diet_food_list.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/20544662797.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/bomberman_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfea8719-8597-43d3-94f3-b326fae31d36/how_to_clean_icoffee_opus_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2c839c-95eb-4391-8ee3-1b0f2fe1f436/pemigowuworubefamekozona.pdfIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_f51f9a70f813470092c2a66ec8625623.pdf?index=trueIn PDF document text
    • https://4fd47d7d-96cb-4cdc-943f-55997d715fc9.filesusr.com/ugd/ab3424_749c0578690d4918b19cfbe61e963bbe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6562701c-03c5-4a2d-8fd4-5160de70269f/57117584035.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_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 5412 bytes
SHA-256: b1e7c5ea13c746dc2a083c366db81c4f2b211b001386598ccd9cbe98a9e5769e
font_01_sfnt_off0000ff2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2A 10920 bytes
SHA-256: 7b413b2ac506fb61bbaed98e760c72a9dce811afa8d9daae769ac2f5c85d911b

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