Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2d7ec5ab33ef70…

MALICIOUS

PDF

82.8 KB Created: 2021-05-14 03:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 973b4b145db4f71cb62d78214672a904 SHA-1: 2d962cdebf117c95143ff117ab6fc21a0d4923e0 SHA-256: 7e2d7ec5ab33ef70f43b06a68f56be237b62f69fc2a637433e305ae6c36aa9cc
236 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO manipulation tactic. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' suggests the content is designed to trick users, and the ClamAV detection confirms its malicious nature. While no scripts were explicitly extracted, the presence of numerous external URLs suggests a potential for downloading further malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://vilenefex.ru/strik?utm_term=1001+arabian+nights+stories
    • http://meleputadu.22web.org/ximodupivuzinelifivapef.pdf
    • https://vobawele.weebly.com/uploads/1/3/5/3/135334277/7483096.pdf
    • http://befigter.xyz/executive_functioning_iep_goalj7mh0.pdf
    • http://proita.space/nicomachean_ethics_book_10_chapter_7o2f17.pdf
    • https://fezizijopugasu.weebly.com/uploads/1/3/4/8/134850826/fevutefasesexule.pdf
    • http://privateguardingserviceagainstdanger.site/anita_brookner_hotel_du_lac83pic.pdf
    • https://vowipolijej.weebly.com/uploads/1/3/4/7/134713390/3e3e715a7f97fe.pdf
    • http://copyrighthelpbusiness.net/83392616680p2szm.pdf
    • http://crystal-light33.ru/freelance_content_writing_jobs_work_from_homew959e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_0a7dbb6b916e4a228fb6df5a6db96a94.pdf?index=true
    • http://jawikaginixuxuz.rf.gd/modicare_business_plan_ppt.pdf
    • http://xamunenefo.rf.gd/sonixuzozadizutiwojubewu.pdf
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_13fd6bcdf6ed433280ac27381f5228c9.pdf?index=true
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_b04abe7febb34e508f2e66ba22c806a1.pdf?index=true
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_61305d58c3414dbeb267361ead46b12b.pdf?index=true
    • http://lofetumavigasi.epizy.com/genevan_psalter_sheet_music.pdf
    • http://rimuvuvipimube.epizy.com/algebra_1_eoc_review_packet_2020.pdf
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_87d1f4f4bd5441328fe3e6256b66e321.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa6e.bin
d79b2e4a66805c12cf14d243456cc6b4ad87050912d44e89d440ccd7289574fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6E 4940 bytes
font_01_sfnt_off00010b22.bin
9cc9a1e635c26544d25824c72d8c3507f53a55de87820c526b27118a72e9e21b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 11164 bytes
font_02_sfnt_off0001311f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1311F 4324 bytes

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