Malicious PDF — malware analysis report

Static analysis result for SHA-256 106c0822dfc474b5…

MALICIOUS

PDF

92.8 KB Created: 2021-05-29 11:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ebcda72a34b56aa7637113a09665020a SHA-1: 59a28c6ca7bc7611c29bad20e71fb23631c9b267 SHA-256: 106c0822dfc474b549ff89478517569eb4a08166494f85d67503ddf21c680ce1
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The presence of a 'download button' heuristic further supports a lure-based attack. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/123?utm_term=malayalam+adivasi+songs+free PDF link annotation
    • https://nadepopuzoli.weebly.com/uploads/1/3/4/6/134611029/9648373f.pdfIn PDF document text
    • https://kitetunevoneg.weebly.com/uploads/1/3/4/7/134703129/rotuxera.pdfIn PDF document text
    • https://lugapageragije.weebly.com/uploads/1/3/4/6/134617753/1883940.pdfIn PDF document text
    • https://popoxalisasuper.weebly.com/uploads/1/3/0/7/130775362/3743853.pdfIn PDF document text
    • https://baliwiwun.weebly.com/uploads/1/3/1/3/131380001/af3ff873542a651.pdfIn PDF document text
    • https://nuruvubapifak.weebly.com/uploads/1/3/1/4/131452890/ravevasagor.pdfIn PDF document text
    • https://toxisejaris.weebly.com/uploads/1/3/4/8/134851702/6676818.pdfIn PDF document text
    • https://nunosutelakib.weebly.com/uploads/1/3/1/3/131383720/jaxuva.pdfIn PDF document text
    • https://kakabotosor.weebly.com/uploads/1/3/0/7/130775724/1499243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5fd61ee70d6d0.pdfIn PDF document text
    • https://fusopozosasotex.weebly.com/uploads/1/3/4/4/134477759/5681432.pdfIn PDF document text
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/6075918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_6019735c3948f.pdfIn PDF document text
    • https://xogegexisupu.weebly.com/uploads/1/3/4/3/134319275/ludoviruxim-notikil-tivigut.pdfIn PDF document text
    • https://govubazidexifa.weebly.com/uploads/1/3/4/3/134342639/379c9706d4623.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369306/normal_5ff784516a96f.pdfIn PDF document text
    • https://vebuleme.weebly.com/uploads/1/3/4/3/134321641/zixozavaxigadagubij.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde099b5-f5b0-42ae-8c64-7b0d6c2fb20c/39583973315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36de18e-f725-44f1-8a3a-f59a2383dc8c/the_wave_2008_based_on_a_true_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e514a4-bedf-49da-bfb9-4503dcaaa507/que_es_la_teoria_del_destino_manifiesto_de_estados_unidos.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00011c35.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11C35 9864 bytes
SHA-256: 7d1bc87acbbc4d16a432eb91c0b7a0ac93941e224c2b8cf8b5ac8b026e37d4cd
font_00_sfnt_off000109e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E0 5396 bytes
SHA-256: 056f0d0a2df644d752375e89fcbdae6a9de8bad410a0e215099b5e369f940f0c
font_02_sfnt_off00013d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D83 12784 bytes
SHA-256: 9db05beae98066b4880cdcd7a30f5b03bd2b2b2244ce2057c24cf1b0f6116976

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