Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c02283f8bdca3a8…

MALICIOUS

PDF

72.0 KB Created: 2021-02-22 00:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d8f5c13f7bf70c923ab5ad605203623f SHA-1: 326d3a5b09a7621d65a3d99224f1b3ef62c5c3b0 SHA-256: 9c02283f8bdca3a8c20dbb34e702c95ac5b85b010bd11485fb810a7ae83f0cf1
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external links suggest an attempt to lead the user to a compromised or malicious resource.

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 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://leonvi.ru/wix?keyword=sharp+notevision+projector+xr-1s+manual PDF link annotation
    • http://topcreditreport.info/sojimefog5enqw.pdfIn PDF document text
    • http://my-favshopc.online/xotinodifazegomorobebulul3nj7.pdfIn PDF document text
    • http://copyrighytsupport.com/oh_china_textbook5oqhx.pdfIn PDF document text
    • https://xuzuvakewose.weebly.com/uploads/1/3/1/6/131637797/loxalep.pdfIn PDF document text
    • http://stikc.xyz/cnet_adobe_reader7ofgj.pdfIn PDF document text
    • http://kulefinimujaleg.iblogger.org/58709370291.pdfIn PDF document text
    • http://zebrait.fun/confess_colleen_hoover_book_summaryjhx1z.pdfIn PDF document text
    • https://ruxibini.weebly.com/uploads/1/3/2/6/132680870/bubomoben.pdfIn PDF document text
    • http://korsabarca.com/441337207118pjsc.pdfIn PDF document text
    • http://fitness1.space/foosball_3ds_max_free_downloadt24p7.pdfIn PDF document text
    • https://dubibezu.weebly.com/uploads/1/3/1/4/131453247/3888401.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/fikuvine/1_anime_go_apk.pdfIn PDF document text
    • http://risepaxazitomep.rf.gd/why_does_kanekis_daughter_have_white_hair.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/c._g_video_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/sinuvadavutemakobavufome.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/52590918516.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/calvin_and_hobbes_comics_free_download.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_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 5564 bytes
SHA-256: c0e08150deba2e275fd8a48741c8f9361849ce9896cc467753f28faf6667ac85
font_01_sfnt_off0000ed35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED35 10976 bytes
SHA-256: 99fc2bd78f00447cb0e85933a59d4032e7191f13a265f95c5c0495552568e090

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