Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7703e784db115b…

MALICIOUS

PDF

95.4 KB Created: 2021-04-06 01:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fc90a757ec748ddc7bfc672aaa0bbf15 SHA-1: ebd3a4c9bea661bd4ad6b75af3c0b8fcfa82bcb4 SHA-256: ba7703e784db115be781b2ca7b13c85e709f169f0a6b8a0ba329fb74ab077e00
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs points to 'jottigo.ru', which is likely part of a phishing or malware distribution scheme disguised as an ebook download. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/award?keyword=download+ebook+the+hunger+games+bahasa+indonesia+pdf PDF link annotation
    • https://pirusamu.weebly.com/uploads/1/3/1/3/131383726/bijevibok.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/nigaxedesatetit.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/ahfdjbT/90449433678.pdfIn PDF document text
    • http://jovasetiveduza.scienceontheweb.net/anthropometric_data_for_architecture.pdfIn PDF document text
    • https://radixukawatezod.weebly.com/uploads/1/3/4/6/134645496/8230331.pdfIn PDF document text
    • https://cdn.sqhk.co/kilalovuge/icgdsjh/lemeguxuzinonokidip.pdfIn PDF document text
    • http://dakajak.medianewsonline.com/mathematical_induction_divisibility_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/hcFfibh/amc_24_movies_tonight.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3ede9e0c-041e-422f-81dd-d058cd4f5a5d/data_mining_techniques_and_applications_for_tourism_internet_marketing.pdfIn PDF document text
    • http://sefowolo.atwebpages.com/48515237960.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/butave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e376dec3-078f-4c56-8456-fbd0f15d1ac9/mcgraw_hill_glencoe_biology_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/pasovut.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/bogimexamoxanu.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/technology_business_requirements_document_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/99427488693.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/zekepimimirubuvelokulel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/086ce3c1-45b4-4a65-84b4-428bb56dc368/nizamoxugitam.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00011349.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11349 14480 bytes
SHA-256: 3d4903a453a4443440f58d389b7bf8865c5be42979da72d778be9c2106909457
font_00_sfnt_off00010047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 5632 bytes
SHA-256: d6f3833e23b4dd46929667492f7ea2d4c8f9e291a60cad315e8c602c26e32a5e
font_02_sfnt_off00013b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9A 11168 bytes
SHA-256: 4273cb0f961b822170ee4f6289d2eaa79e9aa2c58f82b7e9bff0adb7da19ba72
font_03_sfnt_off00016191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16191 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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