Malicious PDF — malware analysis report

Static analysis result for SHA-256 946e06dfdc07e755…

MALICIOUS

PDF

82.4 KB Created: 2021-04-02 02:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a2cfa6da73eb90b7775d059c6275a9ba SHA-1: cf94d0cf6ac877778a188515b561a939b296220c SHA-256: 946e06dfdc07e7557ba418bbe8c42fc7a68edf87c8afed2d2d9c0fa3aa47975d
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, including one pointing to 'soxebez.ru', which is flagged as a potential phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for links, further suggesting malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards a phishing or scam campaign.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=print+webpage+to+pdf+in+firefox PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469643/normal_600ddf1264a1d.pdfIn PDF document text
    • http://fenellalucynelle.info/importance_of_impact_investing5qzse.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501975/normal_5fe00c1c01a34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489853/normal_5fee8626d2283.pdfIn PDF document text
    • http://ig-copyrightnotice.com/amplifi_tt_softwarea3ka0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501965/normal_60014dacd06c6.pdfIn PDF document text
    • http://habercigo.com/porter_cable_model_fn250b_rebuild_kit0iyus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_6059b0a0edb13.pdfIn 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
    • http://moferamobonar.epizy.com/oscar_wilde_novels.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_55105824d1c5453eb7570ccd4cdfddf6.pdf?index=trueIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_cd319bca46ec4f579155c0b1625473f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/midsegment_of_a_triangle_worksheet_answer_key.pdfIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_868e284ac4b74587a6d289ff1bcfcd5f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/85566464998.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/finolavanosuxubel.pdfIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_3d6293d3bc1f43a89d5d5daa59d5bb39.pdf?index=trueIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_ef3bf5d85c004519a8e6ffc46a9f4ccd.pdf?index=trueIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_9702a5254db54922bfb6745b1d3839e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jipowumat/what_are_some_examples_of_poetic_devices.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/reket.pdfIn PDF document text
    • http://zipojadutaxu.epizy.com/28754452082.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65A 5088 bytes
SHA-256: ec1d4a78655f6e0cc8ff833bda89ffa9e1d0d74407fcfc2d215419b7d965f5f4
font_01_sfnt_off000107b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B6 11360 bytes
SHA-256: 85103ce24396ef762497ef6aa1f18f1ac12619ab06f7fdc5e08fb03dd46d173a
font_02_sfnt_off00012e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E49 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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