Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2ba147d8db3faf…

MALICIOUS

PDF

78.6 KB Created: 2021-06-06 06:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7c4fd39a1b471e0f53ddd53d9e59ec50 SHA-1: c23e14cadcd0db87e0b06025bdcae5e4921c84d5 SHA-256: 8c2ba147d8db3fafc6934c0c8f1a09b96a78447c59d7d00eb002126a310229b3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://allytemp.ru/pbw?utm_term=rockstar+games+social+club+install+download+free PDF link annotation
    • https://wojaxesisitofem.weebly.com/uploads/1/3/4/7/134717171/zituwenu.pdfIn PDF document text
    • https://botefajom.weebly.com/uploads/1/3/4/6/134690565/2cf2f367.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402956/normal_5fd0931adc66d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452594/normal_603543b3d43cb.pdfIn PDF document text
    • https://wigimosasalak.weebly.com/uploads/1/3/2/8/132814057/xigajuvifawivam-pafesexe-kefoguxofaniva-zizibop.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/ebc2fdce1.pdfIn PDF document text
    • https://lobusejorul.weebly.com/uploads/1/3/5/3/135338183/4073314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_60481317bbe20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nolumemonip.pbworks.com/f/neural_network_simon_haykin_free_download.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/f/55589154015.pdfIn PDF document text
    • http://gazumadu.pbworks.com/w/file/fetch/144473064/diccionario_de_derecho_rafael_de_pina_vara_porra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b816e7-2ac8-4856-9445-b891ca89eec5/5728352167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8618b5aa-f889-4add-8ec9-86335971a166/pichaikaran_tamil_movie_songs_download_starmusiq.pdfIn PDF document text
    • http://pojaweku.pbworks.com/w/file/fetch/144595851/fobegi.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/telujuwetip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68542900-5f99-4110-906f-1403a0c3298f/vilejizumomexopajaretowat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9153473f-8773-4ee0-8f68-dcbdfd4591f9/larepigiz.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/w/file/fetch/144525309/6231479915.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144462519/far_cry_apk__obb_download_for_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 5524 bytes
SHA-256: a73c4cc9879b23db6851f9b483e9507bbec25e7c58cf739bfba7f9eee59703ad
font_01_sfnt_off0000f7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B9 11488 bytes
SHA-256: 334ab69fb605632e23f21db7fc21a710e351e679889fcfbb4f1add723648cce6
font_02_sfnt_off00011ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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