Malicious PDF — malware analysis report

Static analysis result for SHA-256 156ad23b4f106315…

MALICIOUS

PDF

70.3 KB Created: 2021-02-23 02:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6556872affe001964511b1ddce9bd36a SHA-1: 0400c29e3f99f486b911738f48314e741d70a275 SHA-256: 156ad23b4f106315b8ffb322aa9735cf6dd7f82fc2eaeb5221c1b2c07bbebad8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO farms or to redirect users to malicious sites. ClamAV and ML classifiers strongly indicate maliciousness, with the PDF_SEO_LINK_FARM heuristic specifically identifying a mass of external links. While no scripts were extracted, the embedded URLs are the primary indicators of malicious activity.

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://maypoin.ru/wb?keyword=why%20is%20nigeria%20an%20important%20country%20in%20africa PDF link annotation
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/2aec5.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/c4Vx1Eo/bloodsport_dc_comics_character.pdfIn PDF document text
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/gusawedipil-dabib-bolumeruditubir.pdfIn PDF document text
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/9293351.pdfIn PDF document text
    • http://zatawonilar.iblogger.org/fifty_shades_darker_book_quotes.pdfIn PDF document text
    • https://gunesuzupe.weebly.com/uploads/1/3/4/6/134679160/vabawatuzen.pdfIn PDF document text
    • http://vabuzunaseridal.iblogger.org/gazulasafowepaturokus.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/cujgjjS/36639424136.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/Wmhahdi/2223995663.pdfIn PDF document text
    • https://cdn.sqhk.co/ruselaguzoda/giig2pc/70188910191.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jijulek.rf.gd/21811436893.pdfIn PDF document text
    • http://radetijelatava.epizy.com/free_3dp_chip_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/agneepath_video_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/85750405201.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/zaxiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/thibaut_courtois_clean_sheets_real_madrid.pdfIn PDF document text
    • http://kiroxivox.epizy.com/oligopoly_market_structure_characteristics.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/tetoletodofawo.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/lurozube.pdfIn PDF document text
    • http://dudasuz.epizy.com/butepos.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_off0000d54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54B 5512 bytes
SHA-256: 843cf6428e0eae4aba159527b87cba2279da0433fafc13837d71c3090b43d586
font_01_sfnt_off0000e7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FB 10472 bytes
SHA-256: bd000fd1a7a598081d6146a2bd450c9d531583ee7adbc8e5d0e5078935041194

Open this report in the interactive analyzer, or submit your own file for analysis.