Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd1a50518d54100…

MALICIOUS

PDF

68.0 KB Created: 2021-03-04 01:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0ccfce966fa8448c3b220a107d8061d6 SHA-1: b107c427098cab0edbc081d6523d723a90e7ead8 SHA-256: abd1a50518d541009aafcd266ca8f4ecf84f5dd5a1cd4959e9a9a20941d4d9c5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users. The embedded URLs suggest an attempt to lure victims to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://midufefew.ru/wix?keyword=things+fall+apart+questions+and+answers+chapter+1-2 PDF link annotation
    • https://munefetuwavebif.weebly.com/uploads/1/3/2/6/132683017/badebewejedowi.pdfIn PDF document text
    • http://ruzoboxilotazex.22web.org/32246913161.pdfIn PDF document text
    • https://rarinuda.weebly.com/uploads/1/3/5/3/135349313/damodijawojapa_gokafogawik.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/lumuputibomuj.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/eeb0e116ec1b971.pdfIn PDF document text
    • https://vumeganutubaxo.weebly.com/uploads/1/3/1/4/131406578/ximev.pdfIn PDF document text
    • https://latapelubatute.weebly.com/uploads/1/3/5/9/135960370/jogumuv-bojarozeroluwun-vopekufeb.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/examples_of_food_safety_policy.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/bsf_questions_and_answers_lesson_11.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/wubuvuroz.pdfIn PDF document text
    • https://jimekomu.weebly.com/uploads/1/3/1/4/131453536/6639895.pdfIn PDF document text
    • https://kijujula.weebly.com/uploads/1/3/4/7/134756294/8600763.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/remufuzu/vidyasiri_application_form_1920.pdfIn PDF document text
    • http://zepuwiz.atwebpages.com/puzixuzenajowe.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_off0000cd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD15 5800 bytes
SHA-256: 8fc62fed7db20a803c22b8fec6200de42d67db016421b8cffdf162ef187c64de
font_01_sfnt_off0000e0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EE 9920 bytes
SHA-256: ad22f5077ae7a624d19bfa5a2bad34cad5b3e071ea2cc3697a2f00ee892d78fb

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