Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d79ac0e44f956d4…

MALICIOUS

PDF

37.5 KB Created: 2020-04-21 04:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4b749ff80432aaf82824ccf74cebd5c4 SHA-1: 75b4d77e1dff1e617ffa270753d0ca15c1adb180 SHA-256: 2d79ac0e44f956d4a9bf1d7e563733cb37d8139638d54d55ea800cfbb90fb1b6
102 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files on various domains, suggesting a link farm or SEO poisoning tactic. One of the embedded URIs, 'http://transitioninghomeinc.com/uploads/1/3/0/8/130814341/130814341.html#cbr+app+android', is presented as a 'cbr app android' download, indicating a lure for users. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' further suggests that the document may be part of a multi-stage attack involving password-protected archives.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://transitioninghomeinc.com/uploads/1/3/0/8/130814341/130814341.html#cbr+app+android
    • http://elizabethleecoaching.com/uploads/1/3/0/7/130775725/987e974e09.pdf
    • http://weedenterprises.org/uploads/1/3/1/4/131438162/lotage_wapexobumep_kojuxa_gixowidakurik.pdf
    • http://rethinked.us/uploads/1/3/0/4/130435972/2850561.pdf
    • http://designerswindow.com/uploads/1/3/0/7/130740441/xebevomexeru-zalira-pozitiwuge-guxipagotigeto.pdf
    • http://bestindulgence.com/uploads/1/3/1/0/131070842/931572.pdf
    • http://obxelectrical.com/uploads/1/3/1/6/131606135/filuvekame_zipeso_liriwa_robozusogap.pdf
    • http://e-coa.ch/uploads/1/3/0/7/130739124/f34f2eb.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bc4.bin
5e93c21789d1bbcada155847fa758aeb152c8a755389f2163fa05d2f23618bcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC4 7952 bytes

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