Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22c15c2f97b41db…

MALICIOUS

PDF

54.1 KB Created: 2020-03-25 05:21:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: bc14e19edd9cad0e092d36826a8727e2 SHA-1: b079c6e31e22061dbd18356f5b4c3579a22b6eb8 SHA-256: a22c15c2f97b41dbc994c8ff0548fae883449e89e4fd093ad16c419f4295955d
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various domains, many of which follow a similar numeric or descriptive slug pattern. This indicates a link farm or SEO spamming technique. The primary URL extracted, 'http://pressurecleanit.com/uploads/1/3/1/1/131164110/131164110.html#what+is+ethics+in+marathi', suggests a lure related to 'ethics in Marathi', likely a deceptive tactic to attract clicks. No scripts were extracted, and the document body is heavily obfuscated, but the heuristic firings strongly suggest a malicious intent to redirect users to a network of potentially harmful sites.

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://pressurecleanit.com/uploads/1/3/1/1/131164110/131164110.html#what+is+ethics+in+marathi PDF link annotation
    • http://maipreferredproperties.com/uploads/1/3/0/5/130590374/9d4a6409.pdfIn PDF document text
    • http://harmoniccollective.com/uploads/1/3/0/7/130739126/kalutipuvuf_muresunagadu_nukurari_gikoxotow.pdfIn PDF document text
    • http://www.jwupvdeco.com/uploads/1/3/0/2/130289332/2329822.pdfIn PDF document text
    • http://jadegardencharleston.com/uploads/1/3/0/7/130776659/neregitavug.pdfIn PDF document text
    • http://indianbikini.net/uploads/1/3/0/5/130551129/lojenaxunove.pdfIn PDF document text
    • http://www.jandaservicesal.com/uploads/1/3/0/6/130604452/9138100.pdfIn PDF document text
    • http://shs2020.com/uploads/1/3/0/4/130483770/8157727.pdfIn PDF document text
    • http://reemsaeed.net/uploads/1/3/0/6/130604304/632e6a4e9b1046.pdfIn PDF document text
    • http://nelsonendeavorsllc.com/uploads/1/3/0/4/130488220/b6fb004c1a29d0c.pdfIn PDF document text
    • http://kingsleyjohnson.com/uploads/1/3/0/5/130551015/nubaparawavupi-mokuvoras-gagowedebadomo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0D 9860 bytes
SHA-256: ee425908a1f3e43b25c77e7218c03210c88424d097e4060d87dd44f9893d61c4
font_01_sfnt_off0000914e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x914E 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
font_02_sfnt_off0000a5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B5 12264 bytes
SHA-256: 8d65891f7dce1cd9b5a72e432d61dd56c56e62b00e97076da4f3e7bb45e0914c

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