Malicious PDF — malware analysis report

Static analysis result for SHA-256 12dc8ee44ffe06f8…

MALICIOUS

PDF

46.6 KB Created: 2020-03-15 03:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9cb6974459b7cdc7cbcd1ab43da984a7 SHA-1: b7538f42eb0e73b2b0b04a0e2ce75ffce6af0cd8 SHA-256: 12dc8ee44ffe06f80a329cdf6273b48c52553cf32585ed44fe48457cad7f0ba1
104 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The document body explicitly mentions 'Adobe Photoshop CS3 free trial', indicating a lure to download potentially unwanted or malicious software. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gq0j8.bpmtc.com/uploads/1/3/0/7/130776889/130776889.html#adobe+photoshop+cs3+free+trial
    • http://nekimastrategies.com/uploads/1/3/0/7/130776612/2bfa3a2531f.pdf
    • http://mrglows.com/uploads/1/3/0/6/130605040/fafixoli_xopovuguxe_gejilipi.pdf
    • http://muddyzen.com/uploads/1/3/0/4/130435745/c0e44cf70d2f4d6.pdf
    • http://runningforelection.com/uploads/1/3/0/4/130483309/6035923.pdf
    • http://msmanyhats.com/uploads/1/3/0/7/130739011/d113b.pdf
    • http://christapleasants.com/uploads/1/3/1/0/131070611/wivupuzaf-vozimepex-sotovup-jesizava.pdf
    • http://kaisizhenrenyulecheng.br3h.com/uploads/1/3/0/3/130313480/maviveferuvumib.pdf
    • http://devitsakis.com/uploads/1/3/0/5/130551518/e41de6c3cd87.pdf
    • http://oildale.news/uploads/1/3/0/3/130323733/movujumokixon.pdf
    • http://midlifeballers.com/uploads/1/3/0/9/130969331/rijela-texofudologezi-wimemakemitad.pdf
    • http://demo-0-12-0.octarinesec.com/uploads/1/3/0/8/130874501/lexav.pdf
    • http://lashlab-luxury.com/uploads/1/3/0/5/130588607/4e13cd.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074e3.bin
f733753ce6c675e8fa4a16e111d6ec149f943216b42367704358e94dd0e429d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E3 9592 bytes
font_01_sfnt_off00009896.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0x9896 16036 bytes