Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d9a0343a9cefb8…

MALICIOUS

PDF

57.6 KB Created: 2020-08-27 19:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90be7b9aeec66eed45a603f6c5660546 SHA-1: 27152eb7dd8d9b6c3e9d5dfc94fc10b21946654b SHA-256: 04d9a0343a9cefb8375f6b9aec13a9c3223b5c9b06d1a17744b0a600a56bf555
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading a file related to 'Android hacker's handbook'. This suggests the document is designed to trick users into visiting malicious sites, likely to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.cc/pify?keyword=android+hacker%2527s+handbook+%25D9%2585%25D8%25AA%25D8%25B1%25D8%25AC%25D9%2585
    • http://files.independancenz.org/uploads/1/3/1/4/131483147/rijamapigago_masufewuxekun_mupag_jatupomiz.pdf
    • http://fulij.accelerateyourteam.com/uploads/1/3/1/4/131438268/setaxoguwiwibug.pdf
    • http://files.usaqingshan.com/uploads/1/3/1/4/131454373/8527083.pdf
    • http://files.channamalkin.com/uploads/1/3/2/6/132695258/xafirejiniv_lisej_fisugiwevi.pdf
    • http://files.metzgerpso.com/uploads/1/3/0/7/130738889/3e4c6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/deadpool_kills_the_marvel_universe_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/16965246919.pdf
    • https://cdn.shopify.com/s/files/1/0430/4083/3690/files/british_architectural_styles.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/deficiencia_de_complejo_b.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2743/files/37928811338.pdf
    • https://cdn.shopify.com/s/files/1/0434/5636/4709/files/uefa_champions_league_anthem_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/5528/4378/files/74230265533.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/rimusufedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4970/5881/files/toripejemivaz.pdf
    • https://cdn.shopify.com/s/files/1/0469/3324/6107/files/contabilidad_bancaria_ejercicios_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/miparimuziv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a99d.bin
bc224b2af37457917d20f254ef86cdcf19e39e7f1c750f57de8caf84b5cffb5b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA99D 25712 bytes
font_00_sfnt_off00005f52.bin
8859e5319b268276acbbf3156337e8cd8c1975b5f0ee3794175eb8dfaf4ab30a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F52 5220 bytes
font_01_sfnt_off00007109.bin
951a1d7a03fd57ab9c6147ee2388fbc74091389e0b78dccb53256bd865323ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 16728 bytes
font_02_sfnt_off0000887b.bin
f3639a969942e3bea81e8e316bf482dff402928b33fa667fdea8ea4cc54cfb01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887B 9584 bytes

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