Malicious PDF — malware analysis report

Static analysis result for SHA-256 239f3a06445635b3…

MALICIOUS

PDF

79.9 KB Created: 2021-03-05 04:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dab8887ad899920d4743e2d8d9769348 SHA-1: 84d79ed64591d603df4fe400f05941608e5fd883 SHA-256: 239f3a06445635b3242db6a8849434416d1957f4494e2bd8cdbffcf10908ada3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with one prominent URL being https://maypoin.ru/123. This suggests a phishing or content-scraping attempt. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. The presence of embedded URLs and the link farm structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/123?utm_term=scout+merit+badge+books+online PDF link annotation
    • http://muzoc.xyz/7866884829784kq8.pdfIn PDF document text
    • http://dihtyar.online/how_do_you_test_a_hayward_salt_cell0barx.pdfIn PDF document text
    • http://circulshtangcalip.website/45862280086ogyku.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/tesodagiwor/75449855333.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/bedadafefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a5bf70-4cd3-4d1e-bfb0-5c14761e92be/weber_spirit_ii_e-310_gas_grill_natural_gas.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/51876356303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c1967d-8af2-4eee-8469-03f1c7f92620/how_do_i_set_the_lecoultre_atmos_clock.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/53431820531.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/zepevowufiniwes.pdfIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_ae9515a7df9c417bb766d61cb44103b9.pdf?index=trueIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_4d854d2242234de3b4533497f6fb9e56.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/3157232809.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_2c0ac81b72d342778bf1d33db8b5ac71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96cf26d5-8d7c-48b1-b62d-db25cabca76f/82607786404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde6c9dc-e8b0-48cf-a1f3-9ad759ac9ce0/wofidax.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/bramman_tamil_movie_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e67a5d5-4006-49e4-8533-02d10427e35a/forrest_fenn_treasure_revealed.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/voremanuduvukur.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/42170752288.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_5fad41f1f96348c1a438184270900f1b.pdf?index=trueIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_a57dab85579248aaaa261c1bf89466f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gopuze/cuanto_gana_un_diamante_en_amway.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/experience_certificate_of_computer_operator.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/nuwovaronakij.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_off0000f7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 5568 bytes
SHA-256: 1eb30548c613a4ce492be2e11587984869ff92aaf785d8ba61a397c74b0167ee
font_01_sfnt_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 11776 bytes
SHA-256: 0bee10d33cf640f558144ec5eb91fce52872146299f7538ff5e1926c8574c0ba

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