Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3aa7905843c7401…

MALICIOUS

PDF

131.7 KB Created: 2021-03-17 05:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d95c729e7f878a522d88541059c44442 SHA-1: 9cb5b1d7a74d4ccc515deb0214ddbcd29abcf35e SHA-256: a3aa7905843c7401fe92e9262f6767089bd2342207ade843e26aee1efd775e3a
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 0.9996

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://druttle.ru/wix?keyword=guide+to+legion+wow PDF link annotation
    • http://gojawufeki.getenjoyment.net/adobe_reader_editor_online.pdfIn PDF document text
    • https://gunagabivap.weebly.com/uploads/1/3/4/8/134863042/1204144.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/clase_cestodos.pdfIn PDF document text
    • https://filukekab.weebly.com/uploads/1/3/4/4/134478490/3553805.pdfIn PDF document text
    • https://jarubobukifali.weebly.com/uploads/1/3/5/2/135297267/937717.pdfIn PDF document text
    • https://nijuvijoz.weebly.com/uploads/1/3/1/4/131408832/gikubafano_solefikatuwaza_wolozifeb_garojuji.pdfIn PDF document text
    • http://bolawixefop.mygamesonline.org/35440264417.pdfIn PDF document text
    • https://meripowubizaj.weebly.com/uploads/1/3/5/9/135959363/9928670.pdfIn PDF document text
    • https://lanapovo.weebly.com/uploads/1/3/1/4/131437145/kilafofolib.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/what_pros_use_project_x_lz_shafts.pdfIn PDF document text
    • https://nopefulewipedu.weebly.com/uploads/1/3/4/3/134314682/487e7.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/punurum/10596542771.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/xewokesemudavewa.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/how_to_replace_kitchenaid_oven_element.pdfIn PDF document text
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_747bb68570fd4b88aadbece7c1316aa3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/2020_tesla_model_3_long_range_vs_standard.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/20023252236.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/suninulupewelekaxefizoka.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/wojukimevevowosu.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_7e7045d32f384994b12074291c96ebfe.pdf?index=trueIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_9030dffdd5b744bcba53be828110264c.pdf?index=trueIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_1cc536655e4c4759bb93cdc1ae0c3bc9.pdf?index=trueIn PDF document text
    • http://vexabimumemig.atwebpages.com/kunixen.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_off0001cadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CADC 4632 bytes
SHA-256: 50a468b4659536ce5b76d39c12cb46d1a675e069ddfdaf4455f4e04997c7be45
font_01_sfnt_off0001dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DAC7 11284 bytes
SHA-256: f29ad957b9eec2a28be0b7e84fde29575802d077430955b8d22df7534bd4ff2a

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