Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a47ec4437e350d…

MALICIOUS

PDF

70.6 KB Created: 2021-05-20 02:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b038b9efd7fc187c385f43269d2ccbe9 SHA-1: b5a25645f3e44b6c78c825605f39bb6dd153ccbe SHA-256: 88a47ec4437e350da29e0f27511bc05d482a431938c1e1fcbf27fbc59789c7c7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to benign content, but one prominent link to 'maypoin.ru' suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a link farm or redirection mechanism designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=naruto+vs+bleach+3.3+flash+game PDF link annotation
    • https://vexapezerizerup.weebly.com/uploads/1/3/4/7/134717078/27039.pdfIn PDF document text
    • https://botugesoxa.weebly.com/uploads/1/3/4/5/134509905/e0e59.pdfIn PDF document text
    • https://lomelamul.weebly.com/uploads/1/3/5/9/135994015/pabosawulote_rapovalopefe_rosegapipi_nodadek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_600ef436e556b.pdfIn PDF document text
    • https://vufumepuzatine.weebly.com/uploads/1/3/5/3/135335191/1771180.pdfIn PDF document text
    • https://falototadapi.weebly.com/uploads/1/3/3/9/133989324/6f92fccbffb5.pdfIn PDF document text
    • https://simebofes.weebly.com/uploads/1/3/1/4/131438459/ee78c5a6b3208e.pdfIn PDF document text
    • https://zukevijidogokil.weebly.com/uploads/1/3/0/7/130738647/4bf34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_602841a5113cc.pdfIn PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/vutipakemig_wudubo_dibuw.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/gulapore/happy_mothers_day_inspirational_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/46271044331.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/hollywood_dubbed_movies_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/famous_wildlife_sanctuaries_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5639b46-a403-463e-bb17-33e651447d01/daperifemimonedavemipi.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/19878602994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6a3088-d72c-40ba-b293-bd2b2aea277d/what_are_electric_poison_pokemon_weak_to.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228688b8-c057-432c-91b1-e2b19b0fd3a9/how_to_fix_error_code_11_on_rinnai_tankless_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/zidekudurogawutu.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/funaxemisivemuxovuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca30bdf-dcdb-476e-8a04-bce7fa60aace/rejovedabag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7244db-af35-41a0-8b0e-b239f1c2b0ad/gosiletixuzipalonenix.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/make_money_online_stay_at_home_mom.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/podadigibujebula.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_off0000d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A3 5660 bytes
SHA-256: 67bebb859626bc4600bced50f940494f3f2573e9bca295c930a92c022aab9c15
font_01_sfnt_off0000e6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 10696 bytes
SHA-256: 23977c58aa05416beb194fa7c7e6baa69911409b28e22b797403acb0b03fae65

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