Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a632ef6418784e…

MALICIOUS

PDF

77.6 KB Created: 2021-04-28 13:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1e1913384778039dd1f285ea9fb80a54 SHA-1: 19189e946cf702ca735416f735ead099d5a341a7 SHA-256: 41a632ef6418784e0d32c63191a7ae1e8cb822992b9c144c29b82095b6c7f89a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent link pointing to a URL associated with phishing and a link farm heuristic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to redirect users to malicious content.

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://pelibifir.ru/strik?utm_term=where+is+the+dpfe+sensor+located+on+a+ford+explorer PDF link annotation
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/13.pdfIn PDF document text
    • http://faketikus.22web.org/47717671194.pdfIn PDF document text
    • https://kofoxutekibefa.weebly.com/uploads/1/3/1/4/131454286/wizamenuna_bitivoj.pdfIn PDF document text
    • https://lexikusu.weebly.com/uploads/1/3/1/4/131438729/degidudukafi.pdfIn PDF document text
    • https://mutuwafidiz.weebly.com/uploads/1/3/6/0/136095616/2706612.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/wexoteluwag/mukozubot.pdfIn PDF document text
    • https://fc59733d-949e-4df9-817b-fea2515c5cc7.filesusr.com/ugd/689329_10449b259f5b4ab79760165d08023672.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1caef010-1fa0-482c-bdab-d6406f79a280/49661879987.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/css_grid-_template-_columns_percentage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d255061-66ab-4cdd-8160-6f1d915ebc4a/1996_jeep_cherokee_sport_check_engine_light.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/how_to_deal_with_personal_anger_issues.pdfIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_b2fb943fa92843998896e6e2ee81d1e8.pdf?index=trueIn PDF document text
    • http://folijurojavagig.epizy.com/puxezoninusifikedixutejiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9a1f5a-059a-42e1-a872-293ee4abc225/samsung_uhd_smart_tv_55_inch_price.pdfIn PDF document text
    • http://susijul.rf.gd/verinugome.pdfIn PDF document text
    • http://fizufizobizud.epizy.com/61242874173.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_0fbc2229ffac473586884964a1391fca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/79091842892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a996c34-e3a8-4f1e-9373-6b678d37a13b/butewagukugiwo.pdfIn PDF document text
    • http://bikiribobaxuj.rf.gd/pobemuwotafosu.pdfIn PDF document text
    • http://tezuzatarezoz.epizy.com/mejumariziz.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/59719515117.pdfIn PDF document text
    • https://04ca350e-8f89-4c97-9898-d2626d3c0d07.filesusr.com/ugd/0182ef_65ddd47a48d54332960887e206fbdabe.pdf?index=trueIn 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_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 5324 bytes
SHA-256: 62a2b5f06fe614d7b6ccade02d7b13d4a99fd0a74318439d0dc027ace08015b6
font_01_sfnt_off00010211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10211 11436 bytes
SHA-256: d7d7412cf5641dd045cbd2da937c1f89becf03955bb01ff512eda54170195770

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