Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fac62853ae35992…

MALICIOUS

PDF

41.1 KB Created: 2020-06-02 13:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce39825c3381cc7853e126ecd73dcc76 SHA-1: 71bd718e730b2a13ed506ce049bc48e9b0374e17 SHA-256: 4fac62853ae35992411e054d0ab949134d20948a9026bbd2b97a9ab282845412
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified as a link farm. The primary URL points to 'age of war hacked unblocked', suggesting a lure to attract users. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external PDF links on domains like lockdinside.com and domelinsurance.net indicates a coordinated effort to distribute content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://billionairesmartsacademy.com/uploads/1/3/0/6/130620854/130620854.html#age+of+war+hacked+unblocked
    • http://lockdinside.com/uploads/1/3/0/6/130620393/5145c5.pdf
    • http://domelinsurance.net/uploads/1/3/0/2/130288600/wokime.pdf
    • http://autodiscover.brattleborocjc.org/uploads/1/3/0/2/130289792/2927580.pdf
    • http://jccaportland.com/uploads/1/3/0/6/130621322/mixalav.pdf
    • http://giltnerheavyhaul.com/uploads/1/3/1/4/131438483/762702.pdf
    • http://billionairesmartsacademy.com/uploads/1/3/0/6/130620854/terms.html
    • http://billionairesmartsacademy.com/uploads/1/3/0/6/130620854/dmca.html
    • http://billionairesmartsacademy.com/uploads/1/3/0/6/130620854/policy.html
    • https://sikazagoze.files.wordpress.com/2020/05/bisajokitomofigapubixe.pdf
    • https://zedipuxari.files.wordpress.com/2020/05/rokis.pdf
    • https://zopowozofoje.files.wordpress.com/2020/05/pesoxilojesoragepen.pdf
    • https://nepigipoduge.files.wordpress.com/2020/05/sadiruvidijazudoweroti.pdf
    • https://zimorujiwek.files.wordpress.com/2020/05/xisiviwewo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c8.bin
870bd244fb888c44f5e5d5abbb59d50ce4a259bddbd1a093da8a0ab2d92c1cfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C8 5960 bytes
font_01_sfnt_off00007411.bin
866f818e65d95d7f5a509cad759e0f4726a451f742184b0b4a483fb760a12ecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7411 11284 bytes

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