Malicious PDF — malware analysis report

Static analysis result for SHA-256 31292ba634e237bc…

MALICIOUS

PDF

64.9 KB Created: 2020-05-05 09:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e6cde3e3afbd232089f32c7aa7c9f7f7 SHA-1: 38a89a5c0badf95a3c889299e91589c46ea90134 SHA-256: 31292ba634e237bc80c3d8e6def18886cf1ef76143b420416a64737b36ad4348
96 Risk Score

Malware Insights

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

The PDF document 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. The document body mentions 'Talathi bharti 2019 online form documents', which is likely a lure to encourage users to click on the embedded malicious link. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://fidonow.net/uploads/1/3/0/5/130547624/130547624.html#talathi+bharti+2019+online+form+documents
    • http://thenumeboutique.com/uploads/1/3/0/6/130604093/8264475.pdf
    • http://orchidplaceflorida.com/uploads/1/3/0/5/130588430/mululidadurufo-sifixisalinanu-wovejanobixu.pdf
    • http://hemingwayconstruction.net/uploads/1/3/1/4/131438379/towolosedufubu-zovonogibiwonom-daxukusixabuxi-deziresetuw.pdf
    • http://cannabisusa.world/uploads/1/3/1/0/131071183/womimakos.pdf
    • http://porticohealth.org/uploads/1/3/0/7/130738913/35d0e3a86ae.pdf
    • http://wiggleitjiggleit.com/uploads/1/3/0/5/130590384/xopivi_zopelekuk_zoludomumo_nosonose.pdf
    • http://fichthornpsu.com/uploads/1/3/0/3/130313766/kiretifagibozew.pdf
    • http://twbmotors.com/uploads/1/3/1/1/131163983/zezuzezovexaxeva.pdf
    • http://joandickinson.com/uploads/1/3/0/3/130313803/2280097.pdf
    • http://ridgearchery.com/uploads/1/3/0/7/130739626/tigebu_fofoti.pdf
    • http://wanderingtrailsflowers.com/uploads/1/3/0/4/130491703/kerogevinajesab-pipedibobegeva-jezoxetebuzunak.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095e5.bin
00a5b646b47ed05f549c6887bf82db75d21dfd0643233552bdacbc99f491eb82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95E5 11040 bytes
font_01_sfnt_off0000bbb1.bin
e619a639363efb8a8c499d9b10964d1cd014b9e04bc729d500f2b798c8236684		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB1 16076 bytes
font_02_sfnt_off0000d09d.bin
a87c4308bec7451bee41abd246e299555d1f4370d32e123693255e2733f28b68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD09D 12980 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.