Malicious PDF — malware analysis report

Static analysis result for SHA-256 1522468fbe2279c0…

MALICIOUS

PDF

73.8 KB Created: 2021-03-09 14:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: aa0decc926ffdef56784fdcbe4a5d767 SHA-1: ad8023a398c55836b5f67e2009b1ac1a8519b307 SHA-256: 1522468fbe2279c0708af8ed12ad05a925e7f0527856187327ad7ebbe7f4cd4f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting it functions as a link farm or a phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially malicious websites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/123?utm_term=free++couple+wallpaper+images PDF link annotation
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/lasexit.pdfIn PDF document text
    • https://rawewarox.weebly.com/uploads/1/3/1/3/131379085/zonopivawaga.pdfIn PDF document text
    • https://xozanazefozi.weebly.com/uploads/1/3/0/8/130874019/wejiw.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/sugalu.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/iiihie5/xawedupa.pdfIn PDF document text
    • https://cdn.sqhk.co/zupololano/EKpHUii/89407825364.pdfIn PDF document text
    • https://sowefitubi.weebly.com/uploads/1/3/1/4/131406610/6857717.pdfIn PDF document text
    • https://kivobuduzuv.weebly.com/uploads/1/3/0/7/130739084/mibolobofuwesof-zowitaxodi-ralorivotedirul-fabes.pdfIn PDF document text
    • https://senajadodum.weebly.com/uploads/1/3/1/3/131379015/14c40343663695.pdfIn PDF document text
    • https://gewasulupav.weebly.com/uploads/1/3/0/7/130740056/530a4b7.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/53573076520.pdfIn PDF document text
    • https://poxovarakegi.weebly.com/uploads/1/3/5/3/135326731/4de55.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/60759729717.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/gofilafixu/21288779983.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/visual_german_english_bilingual_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/4431490982.pdfIn PDF document text
    • http://ligujizulogi.atwebpages.com/gesarasukalurozitonuzum.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/adverbial_time_clauses_exercises.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_49f8dc9f3d744038a1feda6539a62c10.pdf?index=trueIn PDF document text
    • http://luxupovokajaf.onlinewebshop.net/wupevufudelokejididakun.pdfIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_a7269a2727a44646b7586364fbb5ca59.pdf?index=trueIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_6ea27005925341c3a833045cada9615f.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_off0000e4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A8 5300 bytes
SHA-256: db2e65002e3dc606035e32751d1299e40343e4b6c2f7dd402e3dd953c9b11018
font_01_sfnt_off0000f6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 10184 bytes
SHA-256: 1491f3972904c0365dc6a3ba0c9be8449db933dc0b025b282053167df39bcf55

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