Malicious PDF — malware analysis report

Static analysis result for SHA-256 878c0bd96cb16396…

MALICIOUS

PDF

77.9 KB Created: 2021-02-21 01:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2d1406ce4b5de5cde375160ded9107aa SHA-1: 8c3ef7d9305c7fff930dc431ef8f0c030b0b9bf2 SHA-256: 878c0bd96cb163966251153e3191d91e167e6b44b8c6e9fd6d2573dbdd2c088b
156 Risk Score

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=how+to+make+your+smoke+detector+stop+chirping PDF link annotation
    • http://microbestdigitalmeter.xyz/wapalemmieil.pdfIn PDF document text
    • https://gikemadisasov.weebly.com/uploads/1/3/4/6/134667176/7479589.pdfIn PDF document text
    • http://uuuuull.space/19845761765rg7fh.pdfIn PDF document text
    • https://cdn.sqhk.co/fakodozug/ejaifge/spirit_riding_free_song_cast.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/5521062.pdfIn PDF document text
    • https://kebotufu.weebly.com/uploads/1/3/4/7/134735966/9533560.pdfIn PDF document text
    • http://1xbet-registrat.site/nitifinadajewohl9tf.pdfIn PDF document text
    • http://idealica-ordina.site/lomivotakunafabologi5xe1y.pdfIn PDF document text
    • http://forpost-electrica.ru/hamilton_beach_breakfast_sandwich_maker_reviewsovxlx.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/zibejadadobexaxel3iur.pdfIn PDF document text
    • https://senevabitup.weebly.com/uploads/1/3/4/2/134234896/8f1d435.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/popilo/ceo._delhi._nic._in_form_6.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/ancova_in_spss.pdfIn PDF document text
    • http://gegenomel.rf.gd/vakodavade.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/91923578190.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/jurozegogizuwosesivamiwig.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/lenovo_ideapad_320-_15ikb_datasheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF205 5676 bytes
SHA-256: 3f53ab564d206055054de1c3c5e05549271126ebc3da214b24f464033eaf1950
font_01_sfnt_off00010544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10544 10868 bytes
SHA-256: 90dee0f9c715183211da429566ca6062ea62ec1e42c2a96eda559dc11a1d1ddc

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