Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af5da4a3daa2eb7…

MALICIOUS

PDF

75.2 KB Created: 2021-01-12 23:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: cfb194acd69825f2e6ee84d751bce004 SHA-1: 54bfdd5d9c0b1f4b3b955647ab678372d3cf26b9 SHA-256: 2af5da4a3daa2eb707c3d2a8d011b0a04f1bfa7823036457726583cb0bf998e4
66 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to disposable hosting services and appear to be part of a link farm designed to redirect users. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's intended to trick users into downloading further malicious content, likely disguised as legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffnew.ru/123?utm_term=the+art+of+speculation+pdf PDF link annotation
    • https://lotinusola.weebly.com/uploads/1/3/4/3/134321880/barepemigol.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/307330.pdfIn PDF document text
    • https://site-1175348.mozfiles.com/files/1175348/blood_and_glory_legend_unlimited_money.pdfIn PDF document text
    • https://diloxutal.weebly.com/uploads/1/3/4/5/134598378/bajazigalerupi-maxelo.pdfIn PDF document text
    • https://site-1218567.mozfiles.com/files/1218567/pefodefogelerifinofaresas.pdfIn PDF document text
    • https://site-1178226.mozfiles.com/files/1178226/rocketman_1997_streaming.pdfIn PDF document text
    • https://site-1175236.mozfiles.com/files/1175236/56641079316.pdfIn PDF document text
    • https://site-1168208.mozfiles.com/files/1168208/the_lightning_thief_cast_musical.pdfIn PDF document text
    • https://site-1175580.mozfiles.com/files/1175580/gevagusikepi.pdfIn PDF document text
    • https://site-1172574.mozfiles.com/files/1172574/rafuguvudenoxilokez.pdfIn PDF document text
    • https://site-1221861.mozfiles.com/files/1221861/82234905357.pdfIn PDF document text
    • https://site-1174360.mozfiles.com/files/1174360/lizorigexotetezikenakax.pdfIn PDF document text
    • https://site-1178570.mozfiles.com/files/1178570/shooter_games_for_macbook.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/jepinebawo/tejisaxoganasokenav.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/waxejojisap.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/rifle_stock_checkering_templates.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_off0000dc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC67 5076 bytes
SHA-256: b0c8c4b89c000780177f8eb2c1d4adfa2ceec90e2041d3d58fbcd6daa113f70b
font_01_sfnt_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 10644 bytes
SHA-256: 4b189c4631d61e205892a0f330013dc6d683236ad8e0a6e168246c015d206237
font_02_sfnt_off000111f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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