Malicious PDF — malware analysis report

Static analysis result for SHA-256 0890ac504ee3917c…

MALICIOUS

PDF

86.9 KB Created: 2021-03-11 18:37:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7ce350cc434254bec10d9389dabd0325 SHA-1: 9a7a3262c0ae804681e393a63c0187a0388e778d SHA-256: 0890ac504ee3917ce54c792a0372df2726bb1106fb5718cc2bdf21c91b3ef400
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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://jacksth.ru/award?keyword=cognitive+behaviour+therapy+for+ocd+pdf PDF link annotation
    • http://mscgis.net/57821750975kfaxv.pdfIn PDF document text
    • https://zarokosa.weebly.com/uploads/1/3/5/3/135300057/4735760.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383797/normal_5ff772847a332.pdfIn PDF document text
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/4178894.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/xhb6iic/mind_games_lyrics_john_lennon.pdfIn PDF document text
    • http://retamos.mygamesonline.org/remifezufafozulegebo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402710/normal_5fee33cc4b697.pdfIn PDF document text
    • https://cdn.sqhk.co/kefofepobam/cACibia/knives_out_house_address.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/jawavawutovasowiwaxasigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487906/normal_6022627d2ae34.pdfIn PDF document text
    • https://baseparefawufif.weebly.com/uploads/1/3/1/4/131453046/e62c462b.pdfIn PDF document text
    • http://wowitaly.pro/35358827815uu6ri.pdfIn PDF document text
    • https://guxisawupejova.weebly.com/uploads/1/3/0/8/130814058/zoxoxuj_milajufasuzex_deropas.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/alh2o6_3__na2co3.pdfIn PDF document text
    • https://lolijigi.weebly.com/uploads/1/3/4/7/134700793/d3ad14.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
    • https://s3.amazonaws.com/rovikibixu/96306894194.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/english_to_spanish_translation_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/xibuwanukesagufenemefo.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/78044594569.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/all_souls_cemetery_long_beach_ca_staff.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_off000109e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E1 5416 bytes
SHA-256: b096d9ae6cdb9c12264ae96f428b1fe4d235d7216d376f0911073dad802d2336
font_01_sfnt_off00011c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C52 10476 bytes
SHA-256: e4a8fd9169dd97ef1c35ca803ef4cc4921415f72b760ec9d44e6f02b7d67ff35
font_02_sfnt_off00013fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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